I recomend Tuna, 3 days out of the week i eat nothing but Tuna with mustard, then the rest of the week i eat whatever. I lost 20 pounds. I went from 220 to 200. I also beefed up a tad with very little exercise. Tuna is high is protien and vitamins( and mercury) with negligible fat. Its filling and if you add mustard and vinegar it tastes really good. Though i added miracle whip today which isn't as healthy, but it was also pretty good. On other days I just eat whatever I can afford, that way i have a more balanced diet. The tuna also saves me money. If your tired of Tuna you could have sardines.
In high school i used to run and do all sorts of calisthenics everyday, but with my schedule thats pretty hard. I try to run every couple of days. At that time I weighed 160 pounds. When you do you actually feel pretty good(sometimes). If i could get back to doing more exercise and also having a better diet i'd probably look better than i did in high school. I was physically fit, but was never toned because i had a crappy diet. Now i have a good diet, and don't exercise much.