+1 on 80 diet 20 exercise split. I yo-yo'd like crazy with active summer bringing me down to 270 and winter eating bring me back to 300+. What worked this year was an iPhone app (free) called lose-it that allowed me to log food as I ate it so I could make real-time decisions about what to eat and when.

Any change that is worth making should not be temporary - so make good changes and make for them life.