There are a multitude of places to find coupons! You just have to know where to look.
First of all, check your newspaper. That is the main source of coupons. There are 4 types of inserts, Red Plum, Smart Source, P&G and General Mills. Collect this, because they are like gold!
Secondly, you can search on manufacturer's websites and their facebook pages for coupons. Often times, the highest value coupons are exclusively available to facebook fans.
And lastly, there are a few great places to print coupons from online. The following are a few of my favorites: