First, the app for Joann Fabrics and Crafts...LOVE IT! Now I don't have to worry about
Next is Michaels. Same thing here. You can view the current coupons and show your phone to the cashier and you are all set!
Now if you don't have access to apps, no need to worry. Many stores will also allow you to show the coupon they send you via email on your phone at the checkout. I actually just did this the other day at Hobby Lobby as they do not have an app (that I am currently aware of). I pulled up the coupon on the email on my phone and just showed them my phone. This such a great way to save paper, mailing costs for companies and so convenient for customers too. So go download your apps! =)