Procrastination

Help! Does anyone else struggle with procrastination? I think I am the biggest procrastinator ever...and I don't know how to break the cycle. Some days I start off really good, following my "to do" list and then if there is even one hiccup, one unexpected set back, I'm done for. I can't get myself back on track. I can find a million and one other things to do than the things I need to do. It is so frustrating to me, I don't want to procrastinate, but I don't know how to stop! Any suggestions??