I am hesitant to share this idea with anybody, though it's not an original idea, because I don't want the competition. However, here I go.
I have been buying things on ebay for a little over a year now and saving lots of money!! I keep an envelope of coupons and gift certificates for restaurants that our family frequents in the car so that we can save money eating out. The stash of gift cards comes from purchases I make on ebay. I know there are certain restaurants that we WILL be going to over the next couple months and order gift cards from people who are selling them, for whatever reason, and get them at a discount. Sometimes, I only save $1 on a $25 gift card, but I'm not going to complain about saving a dollar. Are you?
You can make the whole deal sweeter by paying for your ebay auction though the ebay link on your UPromise account. You will earn 1% on your total purchase to be invested in your childs educational savings account.
I'll tell you some other areas I use ebay to save for if you check back another time. Happy bidding...just stay away from the things I want :).