To Lose Weight Exercise.....but Just a Little

People wanting to lose weight burning 300 calories per day lost more weight than those burning 600 calories per day:

http://well.blogs.nytimes.com/2012/09/19/is-30-minutes-of-daily-exercise-a-sweet-spot-for-weight-loss/?ref=health

I am tired after my hour of exercise that I get on weekdays (30 min on the bike, 30 min with weights). My weight loss has hit a plateau, but I think that's due to my food portions.

I like to cook and enjoy eating it. All those Margaritas don't help either.

The more I exercise the more I feel like I have earned some Haagen Daz vanilla with chocolate chips. That 'splains it all in my case.