The Most important thing I can suggest for using coupons is to find a way to organize your coupons that work for you!! If you can't keep them organized they are no use to you! I used to alway use an envelope and I would get frustrated and give up. I do know people that use envelopes or cut as they go and it works for them. Now I keep them in a binder and have saved thousands!!
My tip would be to gather all your sales ads, find the lowest prices & circle them on the ad.Then get your coupons together for the sale items. Then go to Walmart & reap the rewards! I have saved quite a bit of money price matching at Walmart!
Every Sunday and every time I go into a store, I grab an ad. I save all the current ads in the front of my coupon binder and anytime someone in the house needs something, I check through my coupon collection as well as all the ads to be sure to get the cheapest price! (That's what happens when you don't have a smartphone with apps to do that sort of thing for you! ;D)