I want to do the same, I decided yesterday that today I will change my diet and up my exercise. I used to jog regularly, and it's true, you feel so much better and sleep better when you are fit. I'm gonna put my goals here to clarify them for myself;
- build more muscle/tone
- go to the gym at least 3 times a week
- jog for 20 minutes at least 3 times a week
- eat 3 times a day
- no chocolate or ice-cream / junk food except once a week
- go to bed at midnight every night (instead of 3 am)
And I'm going to the gym in an hour for real