Dieting. Blech!

I just joined Weight Watchers.  Again.  For about the 200th time in my life I think.  The last few times I joined all I did was gain weight.  I don't know why I always think it will be different this time.  I just get desperate.  I picked a solid, fairly-easy-to-achieve 20 pounds to lose as my goal.  I'm doing it online and just paid $17.95 for one month instead of boxing myself in to the 3-month plan.  I think the three-month thing kinda freaks me out and I feel trapped and can hardly stand it.  We'll see if taking this one month at a time will help.  I want to get back to looking like this picture.