This list is created from my personal research where I checked studies of many things and if they improve intelligence and focus. Some things are also from personal experience.
Keep in mind that this is a work in progress, and things can be changed or improved on this list, and more things can be added too.
This list simply aims to achieve effect of mass, so that many possibly beneficial things add up to a greater effect together.
1. Binaural beats
2. Isochronic beats
3. Meditation
4. Plenty of water
5. Logic puzzles and problem solving
6. Debates, debating, arguing
7. Logic in form of premises and conclusion
8. Masturbation, edging
9. Logical equations
10. Considering all options
11. Games
12. Natural sounds, birds, river, waves, ocean, fire
13. Food and drinks which increase intelligence
14. Memorization and repetition
15. Persistence
16. Effect of mass, Perfect amount of everything
17. Comedy
18. Learning new things. Doing research.
19. Learning general truth and observable facts
20. Learning logical axioms
21. Learning logical connections
22. Learning negations of logical connections
23. Learning general false claims
24. Learning logical fallacies
25. Making plans
26. Making goals
27. Learning what achieves goals
28. Learning what is useless for goals
29. Learning what is harmful for goals
30. Learning what is not harmful for goals
31. Deep proper breathing for a long time
32. Light therapy
33. Conversation
34. Stories
35. Poems and poetry
36. Cold showers
37. Prayer
38. Lists
39. Exercise
40. Reading smart text
41. Progressive muscle relaxation
42. Quality sleep
43. Tests. Test knowledge.
44. Be creative.
45. Writing
46. Learning a new language
47. Exploring new environments and situations
48. Step outside comfort
49. Expose to new ideas, information and thoughts
50. Reducing stress
51. Learning combinations
52. List of facts
53. Long list of things, notes, actions, games, sounds and apps for brain to focus on all
54. IQ tests
55. Word games
56. Memory games
57. Quick thinking games
58. Considering all options, list of options
59. Two premises and conclusion in all
60. Uncomfortable, tense situations
61. Seeking proof
62. Divination and magic
63. Only learn what you will remember
64. Exposing to opposite views, more options
65. Creating logical structures of text made from premises and conclusion
66. Pleasing games
67. Many types of games played which develop different things in brain
68. Questioning all premises
69. Questioning opposite premises
70. Learning different logical structures
71. Learn different goals, which goal to set, set goals, achieve goals
72. Learning what achieves goal, what doesnt achieve goal, what negates goal, what doesnt negate goal
73. Exposing unproven premises and assumptions, unmentioned premises and assumptions which conclusion depends on
74. Drink 900 milliliters of water at once. Variation. 3 to 5 liters of water per day.
75. Practice period of hunger
76. Dont practice period of thirst
77. Do calculations
78. Listen to fun music
79. Explore many topics and research about many topics
80. Extend your thinking to many areas of life
81. Create new truth
82. Write speeches
83. Learn about rhetoric
84. Read books about debating or about topics which you like
85. Read scientific research, statistics, probabilities, observations
86. Extend your view
87. Testing. Do experiments.
88. Think of solutions to difficult problems. Many problems.
89. Write down everything which is important. Memorize it. Study it.
90. Write long logical arguments and research
91. Dedicating lots of time to improve
92. Setting priorities, goals by importance
93. Rest and entertaining apps
94. Changes
95. Arguing for opposite views
96. Use full power of AI
97. Remove that which negates goal
98. Visualization
99. Plenty of small improvements lead to one big improvement, as long as their combination isnt harmful
100. Classical music
101. Read life hacks and tips for intelligence
102. Spaced repetition is best for learning
103. Smiling improves mood and intelligence
104. White noise sounds for intelligence. Brown, pink and grey noise works too.
105. Book summaries by AI or by apps, or by YouTube
106. Every day, remember the important things which happened that day. Improves memory.
107. Puzzle games
108. At least 1% better every day.
109. Drink water before sleep. Drink water when you wake up.
110. Body scan meditation
111. Dont do all at same time. Do one task at the time.
112. Build and write down vocabulary of things and logical connections
113. Card games, board games
114. Engage all 5 senses
115. Learning moves
116. Lots of sleep
117. Use opposite hand for writing
118. No multitasking. Focusing on one single task means that one task will be done the best.
119. Remove distractions
120. Visuospatial reasoning
121. Executive control
122. Relational skills
123. Combine binaural or isochronic with birds or wave sound, and with deep breathing, body scan or progressive muscle relaxation or logical tasks or games or visualization, and with 900 milliliters water.
124. Deductive reasoning
125. Inductive reasoning
126. Reading debates
127. Dont repeat tasks too much. Move to next task once one is completed.
128. Write down what to do
129. Write down what not to do
130. Think of questions. Look for questions.
131. Constant improvement. Improving all the time.
132. Use all available resources to improve.
133. One or two meals per day
134. Not peeing for some time, holding in pee improves focus
135. Watch educational documentaries
136. Take notes of things, of key points
137. Write essays
138. Attend lectures, learn from others
139. Study philosophy and morality
140. Improve reading speed
141. Develop emotional intelligence, understand emotions
142. Organize information in categories
143. Explore different cultures
144. Learn about nature and places
145. Solve riddles
146. Learn about programming
147. Practice lucid dreaming
148. Play strategy games
149. Improve creativity
150. Use learning apps
151. Track your progress towards goal
152. Practice Tai Chi
153. Isolate yourself from others for some time
154. Practice drawing
155. Dance
156. Study history of things
157. Work on your health
158. Improve typing speed
159. Improve writing speed
160. Make statistics, percentages, probabilities and comparisons from data
161. Do pleasurable activities
162. Organize all things in categories
163. Birds sound plus waves sound, or just one of these at the time
164. Period of eating and period of fasting. Dont eat for 16 hours.
165. Get proteins, all vitamins, omega 3, chocolate, milk
166. Take tests over and over until success
167. Drink green tea, coffee, with water168. Learn to play a musical instrument
169. Change daily routine
170. Research what improves intelligence
171. System first mentality for reaching goal. Create systems.
172. Constant desire for knowledge
173. Constant sustainable progress
174. Challenge yourself with new challenges
175. Make space for new thoughts
176. List negative and neutral things and remove them or modify them to positive
177. Have a list of best books for improvement
178. List positive things and increase them
179. Set goal to be the best
180. Set obstacles which take effort to overcome, and then overcome them
181. High frequency and high duration of work on improvement
182. Never stop moving towards goal. Moving faster towards goal is always better.
183. Break down path into steps towards goal
184. Focus on measurable and observable results
185. Prioritize tasks which bring you fastest to goal, remove tasks which dont bring you to goal
186. Prioritize quality over quantity, but have quantity too
187. Stop doing meaningless things, only do that which improves you the most
188. Plan your rest
189. Invest in technology and devices which you use to improve yourself
190. Learn about survival strategies
191. Learn what improves your survival and health
192. Learn about all types of science
193. Learn scientific methods of observation and repeatable results
194. Spend time in nature, in forest
195. Read comments