I guess I am fortunate that the words "sale" and "clearance" hold no attraction for me. When I buy things on "sale" or "clearance" is when I am most likely to buy things I don't want or need.
I have the apps on my phone for Michaels, Joanns and Hobby Lobby and I do use their coupoons.
But I know from experience, the scrap supplies I don't use, the food in my pantry that is out of date, the clothes in my closet I don't wear - most were on sale or clearance. Seldom to I purchase sale or clearance - its seldom what I want or will use or will wear.
I will buy one thing I really want rather than a shopping basket full of clearance things I think I might use at the moment but in reality, will never use.
If I am looking for a particular item and it is on sale - I will buy it at the lower price (like my Big Shot) but I will not look at clearance or sale items to see what jumps out at me - because I will come home with some and it will end up being donated somewhere.
A sale or clearance item is only worth buying to me if I would have really wanted it at the full price too. If not, then I really don't want it at the reduced price.
Can't help it - that is just the way my brain works. I learned as a teenager making baby-sitting money that I'd rather have one really nice blouse that I really really wanted than 2 or 3 less expensive ones that I didn't like as well. To this day - that is still my mindset.