Answer: Ein hadavar talui ele bi (it all depends on me)—fixing yourself fixes the world.

Check out the shiurim (they're in Hebrew) of Rebbi Rafael Greinaman shlit"a (available on Kol haLashon as well as by calling 072-235-1290, with a weekly Motzei Shabbos shiur under extension 1-1), who specializes in this area in particular.