1. Imagine the most perfect world you can think of, with all the desirable good qualities and without any undesirable qualities.
2. Take steps to move closer towards creating such a world. Do everything to make it happen without losing good faith.
This seems like a rather simple moral system. Of course, people might disagree on what desirable and undesirable qualities are.
People should always have their perfect world in mind when making decisions. Every decision should bring them closer to it.
One must construct his perfect world in mind before constructing it in practice. He must, like builder, imagine and create.