I had been able to stop Mast**ing about 5 years ago. I do not remember when, but I think about a year and a half after stopping, I had a fall. Now here I was on this great streak, and BAM! My first thought was, "how can I face this and keep this up? Will I be able to go another year and a half again? It seems so long just to match my previous best." Then I realized that I don't really care that much for such thoughts. Why do I have to worry about matching my streak? Just worry about today! What will be tomorrow is unknown.
And I'm glad to say, that since then I have not fallen again. Each moment and each day is a Simcha, it is a moment of freedom. Don't get down over the fall, it just ain't worth it; not when today and tomorrow can be so much better.