Charmtime -
I work fulltime and go to grad school at night twice a week. My schedule on school days is up at 6 - leave house at 7, get to work at 8. Work 8-5 then school from 5:30-9, home at 10:15.
The thing that helps me most is making my lunch/dinner the night before. It takes about 15 minutes, something I have time for at night but not during the mornings. I also keep food in my office. My drawer is filled with packets of miso soup (35 calories each), "juice boxes" of chocolate almond milk (100 calories), Luna bars (140-180 calories each), and the tea I like.
My dinners on school nights consist of peanut butter and jelly on whole wheat bread (330) and an apple (100) and sometimes a greek yogurt (140).
For lunch I try for salads, or sandwiches, but a lot of times lately I am eating Amy's Frozen Dinners. I like to eat whole foods, but with my schedule sometimes it's not entirely possible. Those frozen dinners are organic, vegetarian, whole grain and whole foods based with nothing processed and no chemicals.
I can't get up and work out at 5 AM on my schedule. I go to yoga class twice a week and I try to make it to the gym at lunch to run.
Breakfasts are quick - eggs and toast, oatmeal with peanut butter, bagels and coffee.
I snack a lot. I snack on low fat cheese and fruit and yogurt and luna bars mainly. I also eat every few hours, always. Check out my meals for the last week in the daily calorie thread.
I think the most important thing about eating healthy on a tight schedule is to NOT eat out and buy healthy foods to take with you and also stuff to leave at work. Stock your desk and work fridge with snacks, or carry a large tote with lots of snacks. If your school has a salad bar, use it, otherwise, bring your food from home. Bring things that are easy and get used to eating the same foods. I know I could eat more fresh foods but I don't have the time, so I do the best I can. I personally feel like my diet is probably better than 90% of American's anyway, so I am doing OK.
Good luck to you!