The momentous thing in human life is the art of winning the soul to good or evil.

What actually shapes a person is rarely a single decision; it is the long quiet business of being drawn one way or another by influence, habit and company. Persuasion of that sort gets called an art because it works by attraction rather than instruction, which is why lectures change so little and examples change so much. Everyone is subject to it and almost nobody notices it happening. You are doing it to other people as well, intended or not.

Look at whose company leaves you better and whose leaves you worse over months rather than evenings. Then adjust the proportions. That one change accomplishes more than most resolutions.