for breakfast i have special k, various dif flavours, or i think cheerios have a similar amount of calories, for lunch ive been really getting into soup, but not cream based soups, more broth/ veg based soups, i like the covent garden ones, the carrot and corriander or winter veg are quite low calorie, and i'm a pig and eat the whole carton for lunch, works out about 300 cals but a low cal sandwich is like 400 so i'm happy with that, and cos you get so much it fills you up. either that or good old canned heinz soups like chicken and veg or whatever, but i usually have some crackers or rice cakes with the tins of soup cos they arent so filling. I mix it up sometimes by having a salad, and if i really fancy a sandwich i go for a wrap instead.
dinners have been a bit more relaxed, i live with my parents so its a bit much to ask they cook something different for me, but i've been trying to avoid obviously unhealthy ones like pasta, and having stir frys and things instead, either that or a salad and a chicken breast cooked in the oven (with or without seasoning).or just regular dinners, but i usually half the amount of carbs i would usually care to have and replace it with more veg! to be honest dinner i'm quite relaxed on, but i factor in what ive had the rest of the day, so if i've been bad, i'll have salad but if i've been good i'll have something more interesting, but mainly i try to keep below 500 calories for dinner
snacks, i have bought a popcorn maker, which makes popcorn with no fat, so i do a handful of those, or you can get walkers french fries which are only 84 cals per bag as a treat, for a sweet treat jaffa cakes or kit kats are quite low in calories too, but i limit myself to one treat a day
i have also replaced my usual numerous cups of tea and coffee with herbal/fruit teas (unsweetened)
ps if i'm hungry i feast on veg and fruit
hope this helps!