Don't buy newspapers just because they have coupons. Today many people get their coupons from the internet but newspapers are still a great way to get coupons. If there aren't any coupons in the paper that week that you will use though, it's not worth the cost of the newspaper. Many times I have not bought any newspapers because I wouldn't use the coupons that were in there that week.
How do you know what coupons will be in the paper? I subscribe to several couponing websites and several of them will send out an email that will have a link to see that weeks coupons. However, I personally visit SouthernSavers who has a tab on the top right of the page that says Sunday Ad Inserts.
When I do buy newspapers, I don't always clip all the coupons. Even at a reduced price, an item you aren't going to use isn't a deal. I only clip the coupons for products I know I will use or for products we will donate to the troops or local charities.