I try to buy the best quality turkey and ham deli meats, smoked swiss cheese, and whole wheat pita bread..and a good quality honey mustard. Take 2 to work, one I eat at 9-ish, the other when I get hungry again. I buy Nature Valley granola bars, and take 2 of those as well.
I drink SoBe zero calorie waters- 2 a day in cooler weather, 3-4 in hot weather.
And of course, the ritual morning 12oZ coffee.
Trying hard to eat better, and less. It's EXPENSIVE to eat healthy here. Salads, fruits, whole grain stuffs, not cheap like mac n cheese and hotdogs.
Like a lot of things, I think it's better to say you can have your food any two of three: good, cheap, easy. Most Americans chose the cheap and easy route. Doesn't have to be expensive, but it takes more time and knowledge -- shopping for good deals (including stocking up during sales), preparing more of your own food, knowing stuff like how to marinate lower-cost cuts of meat. Rather then buying bottled drinks everyday, buy some flavoring or Gatorade mix when it's on sale and mix your own (I usually do 1/2 the strength the package recommends). I like the 4C Drink Mix sticks, every three months or so they go on sale at my supermarket for half price and that's when I'll stock up.
I try to save money by buying good stuff on sale and spending a little bit more time making my own stuff (I bake my own bread, whip up a batch of cookie dough each month I freeze, make my own yogurt...all of those most of the time is just thinking ahead and washing dishes rather then the time it takes to actually make them). I'd rather spend my money on good basic ingredients and buying local food in season then on cheap prepared foods.
Save bottles when you do buy bottled drinks and wash them out...they make cheap canteens you can reuse a many times. Freeze 'em and pop them in your cooler (although personally I like luke-warm to warm water when I'm working hard...cool and cold drinks mess up my stomach when I'm really going full bore).
BTW...love the Nature Valley bars. At times in the past I used to eat one plus a juice for breakfast while commuting to work almost daily. Probably could save money if you shop carefully and make your own gorp for your daily snack, but the great thing about the NV bars is they're almost as good as Twinkies in longevity. I've eaten ones out of the bottom of my hiking daypack that were probably a year past the "best by" date
Keep some "emergency" ones in your kit, glove box, where ever for whenever you need a quick snack because you feel yourself getting loopy. Nice mix of immediate sugars and longer acting carbs.
Most of all, listen to your body and figure out whats works well for you!