foods to lose weight

I work long, long hours...least 12 hours every day of the week; due to my job I usually have to get up in the middle of the night to take people different places. I start at 0630 and get off at 1900; unless working overtime. My night runs to the LZ is from 2200 to 0400...I have crazy hours. I could put in time for the gym...but after these hours and knowing I will have to wake up in a few hours...I just dont feel like hitting the gym. Pure lack of motivation. I would like to lose a little bit more weight though...what kind of foods can I start eating to help a little bit. Shoud I skip a meal here and there or what? When I first got over here I lost weight, I had to put 3 extra holes in my belt; but I havent lost any lately. What would be a good diet. Also, what kind of foods could I eat to get me going...to keep me awake or give me more energy after these midnight hours.....thanks to everyone with a helpful voice.....take care everyone.