In order to be sane, one has to be a discipline.
But how would someone can achieve discipline? You need something powerful which can hold you accountable. Now what are powerful stuff? In my opinion there are 2 powerful objects that can hold you accountable:
1. Money
2. Religion
Only something powerful like these two can force you to achieve whatever your goal is but be aware, don't go on extreme level of any of these two. Otherwise you'll end some other difficulties.