The best way I have found is to go to a warehouse club such as Costco, Sam's Club or BJ's and buy the items that offer box tops in bulk and the points are at least doubled in value. Also ask your friends and family to do the same.
You can receive more boxtops by registering at the box tops web site. There you can enter contests, find brands, and purchase items through the store for more boxtops.
Check the boxtops website. Usually there you can find ways to win boxtops, get coupons for items with double box tops called the big clip, and they also have days that you can buy so many items and get double box tops.
You can earn bonus box top points by purchasing items on the original Boxtopsforeducation website. They also have various sweepstakes there to win extra points for your school.
