thre are many places to find rebates. you can search this forum, search the web "rebates", check manu websites for their rebates (sometimes they have off the wall ones like buy 3 of this product and receive a reuseable bag or something like that.
as for getting success with rebates, make sure you follow the instructions fully, make sure the envie is properly sealed (if you must include upc's tape the envie shut so they don't fall out if the envie glue doesn't hold, DON'T use a highlighter on your receipt as that will wash away the writing by the time it gets to get addy (make sure you circle in pen-i prefer blue or red ink as it is different from the black type on the receipt.)
Don't give up. Keep trying. It is definitely worth the time and stamp to mail them out. I have made money using rebates with q's.
Dog Food q's ($2.50/1 or higher)
Coffee creamer (liquid or powder)
Hillshire Farms Lunchmeat
Laundry Detergent $1.50/1 or higer
try me with others