I do oatmeal every morning. It's cheap - organic is $1.19/lb at Whole Foods in the bulk section - and you can add all kinds of things to it - fresh or dried fruit, molasses, cinnamon, or whatever else you can come up with. I add flax seed oil to get some omegas in there.
One day a week you can make muffins with fruit and bran, and use those for breakfast or a snack throughout the week.
As far as snacks, having a bag of baby carrots and pre-cut fruit in the fridge is a good idea - no prep required.
Smoothies made with fresh fruit and greens are good too, but a bit more time consuming, and if you are drinking them daily, can get expensive.
I don't know how well these things fit in with the Weight Watchers plan, though, so you may want to check that if you're counting points.