One of my favorite Tweeters Bria Quinlan does a really in-depth hand-on workshop about setting goals and achieving them, but you should do it with a group you'll work with moving forward - say a critique group. I'm not there yet, but I've still always wanted to take her workshop.
Low and behold, Bria is doing an intro / abbreviated version of the workshop for free over the past week on her blog. You can join in at any time - just go to Day 1 of "Goaling to Success" and start there. We are still only up to Day 3 and I'm still working on my first set of goals list. Wish me luck and join in to help yourself set some personal or writing goals!
Bria's Website is here.