For getting a routine toward healthy, cheap eating, I picked up a book called A Guy's Gotta Eat a few years ago. I assume it's still in print. It's cheesy, but there are some great ideas in there for healthy, fast eating. One of the ideas is to keep as little fresh food on hand as possible, as single guys have inconsistent schedules and tend to waste food. Use frozen meats, frozen veggies, and canned legumes for most purposes. You can make nice pasta sauces out of canned ingrediants that are 5x better than anything Ragu can serve up. Using fresh ingrediants you get to 20x better.
You can always marniate some meat (chicken in teriyaki sauce, pork in some type of lime sauce, etc.), broil it, steam some frozen veggies, and have cous-cous on the side. That takes absolutely no effort.
Chicken breasts are indeed key. Buy frozen ones and just defrost when you need them. Frozen juice concentrate and plenty of eggs also are important.
If you're busy and your town has grocery delivery, consider using it. It's usually a $5 delivery charge, but that way you won't get stuck when you feel too lazy to get to the store on Sun and then have no food in the house all week.