Be on the lookout for specially marked boxes of General Mills cereal in the value size.
Some of the boxes include high value coupons on Mattel toys like Hot Wheels tracks and Barbie Campers.
A number of them are $5 off.
The cool thing is that they do not expire until Dec. 2012.
The coupons are on the box itself so you'll have to buy it and cut it off the back.
Boxes start around $3.98.