Keep receipts and send in rebate slips. Very few consumers actually return rebate coupons. Which is, of course, exactly what the manufacturers are hoping for. Don’t be a sap… get what you’ve got coming. Keep your receipts and don’t hesitate to return anything that disappoints you in even the slightest way. Keep in mind that many stores will refund the difference if you find an item cheaper elsewhere after you’ve bought it and most will match competitor’s prices.
The Microsoft founder -- and richest man in the world -- also suggests one great book to read.