I read something on this Forum that hit me hard. Someone said to another newbie something like, "wouldn't you like to spend the rest of your life LIVING as a mentsch, rather than as a pretender who's walking around with a dirty little secret?"
I'm afraid there's only one answer to that question. (The only question is how to get there?)
1) Pull in kedusha, don't push out sin.
The goal to "banish sin" might be a set-up: better to fill its place with enough good that sin has no more home. Fighting 'evil' alone just exhausts me while energizing sin into some 500 pound gorilla. Better to simply turn to good. (Besides, say "I won't think about elephants" for 20 days, and what will you think about?!)
2) Imperfection is just perfect.
This insight dissolves my fears: I'm not obligated to have a perfect plan, or to do it all, or perfectly, or forever, or sweat. Perfectionism and self-flagellation are not Jewish values. He only wants us growing in the right direction "One day at a time."