Time to get serious!

Ok so I've been half trying to loose the extra 40 pounds I'm carrying around. I say half trying because I’ve lost and gained and lost and gained back again about 20 pounds in the last year. It seems I just cant stick to my fitness program. Its not that it is exceedingly hard or anything I just lack the energy and motivation to do anything most days. I managed to loose 20 pounds in the last year and I’ve kept that off. I tend to eat healthy for the most part so I know two things are holding me back, exercise, and forgetting to eat for most of the day then gorging at night. So I am going to eat small regular meals through out the day and make time for exercise. STARTING TODAY! Does anyone have any ideas on how to muster up the energy?