Ok. Just wanted to know some basic stuff, and all you really need to to do is follow basic stuff.
Eat your 3 meals, breakfast recommended to be the biggest, but it doesn't really need to be, if you can try to at least eat some toast, a bagel or some kind of bread in the morning. Wheat would be preferable.
If you are unable to make breakfast your largest meal, aim for dinner, your lunch should always be around the same amount, whether it just be a sandwich a drink, or a sandwich with salad, and a drink.
Cutting back on caffeine is always good, so if you don't drink it much of it to begin with, you really shouldn't have a problem with it. Unlike me...I need my caffeine or I get serious headaches.
I mentioned fish because, well it's good to eat fish, you don't want to eat too much of it though, that can actually cause problems for some people. Should, at the very least, have one serving of fish a week.
Other notable stuff, if you are just going on walks, doing small workouts, and are not concerned about muscle growth(not to be confused with muscle definition) you want to eat something with carbs, not vast amounts of protein, with a fruit of some kind. You should try to eat it 30 minutes- to an hour before the exercise, if you can't do it before, do it directly after.
If you are doing a heavy exercise, with more intense things like weight lifting, you should always try to get a large amount of protein, with an adequate amount of carbs, and those meals should always come before. Then afterwards have a glass of milk, or protein shakes, if you are into that.
Basically cardio and small ab workouts-Carbs is what you want.
Weight lifting and cardio-Carbs and protein is what you want.
Also, having a beer for like 3 days a week with your dinner is good to do, especially if you start a workout/exercise routine. It helps with metabolism.
And of course, you want your fruits and vegetables if you can get them in.
You want a routine that turns into habit basically, get foods that can fit into your budget, that may mean not eating the most healthiest of the healthy things in the world, but it's better than eating fastfood or something of the sort every day.
With all that being said, I'm not a nutritionist or anything, but I keep myself in relative good shape and while I won't claim to be the healthiest eater in the world(I don't exactly need to be either, since I'm blessed with a strong immune and metabolic system), but it's basic stuff you should follow.
Routine turns to habit, I'm echoing this thought because it's true, just stick with the most of what you can, and do it the best you can.
--
-