Local Newspaper- We found a deal to get it delivered on Thurs and Sunday. It was cheaper to do this than to buy a weekly paper at the store.
Online sign ups and samples- I watch these blogs for mailing sent out from companies. If you have a favorite brand they will probably send you coupons. I signed up with all the formula, diaper, and baby companies when I found out I was pregnant (each time) I get sent samples and really good coupons. Other companies have this too. Check the web site of your faves.
Printable coupons- There are several sites that you can print great coupons from. A few of my faves are coupons.com, Redplum, and smartsource. Also, the blogs will often post special deals. Another site with printables is Meijermealbox.com. I will give the detailed instructions further down.
Catalinas- These are the coupons that print at the grocery store check out. These can be high dollar or not worth it so you have to pay attention
E Coupons- Sites like Shortcuts.com and P&Gsaver.com have e coupons you can load on to your loyalty card (Kroger) These are nice because they are stackable which means you can use them with manufacturers coupons.