Other easy alternatives are fruit, bagels, breakfast bars, and english muffins. All are easy to eat on the run. You don't need to restrict yourself 24 hours a day. Don't worry if you have a Big Mac and fries for lunch. Just make sure you balance it by having a nutritious dinner.
Moderation is the key.
Try having a banana or some yogurt as a snack instead of junk food. Small changes can lead to a big difference. I don't have any will power. This is a tough one. You can avoid situations where poor will power will hurt you, such as going out for beers after the game.