I'm a big fan of Fiber One products.
Their raisin bran is really good, and they have these bars that are awesome. They even have yogurts which are delicious, come in small 50 calorie sizes, and are incredibly satisfying. They also have fiberone cottage cheese, which is good. (I started to miss all of these as soon as I started talking about them, you can't get them here
Some other cereals that are really good is the Kashi brand, but you have to make sure that you read the nutrition labels because some are just glorified cheerios, but others pack a protein/fiber whallop.
I never got enough fiber before I started eating these. There are some good breads at walmart that are high fiber, but you have to try multiple ones to find the one you like. There are also Joe's (?) Heart pitas in Walmart that are delicious.