Trying to get back into couponing

Hey ya'll, I recently moved back to my hometown (Dayton Ohio) and I am looking to start couponing again. I extreme couponed a decade ago, but its been a while and I am really rusty. Where are the best places to get coupon inserts? Does anyone near me have an insert supplier? Thats how I did it before. I picked up several sunday papers at Dollar Tree and got inserts in bulk from a local lady. Any help would be much appreciated. Im going through some things and I am basically having to start my adult life over from scratch.