the day after a holiday, stores discount their prices on holiday goods usually be 30%, and on down each day after the holiday. I get greeting cards, wrapping paper, trinkets for party bags, table settings, picture frames, gifts, etc. all on clearance. I can use them for the next season, but some things you can use all year round, like table settings and cupcake papers... then next season you save time AND money.
Target, grocery stores, even Victoria's Secret!
I often find gift sets of perfume or body lotion, baking mixes, etc. that I user all year round for people at work or younger cousins, etc. you can repackage them in cute baskets to make them non- holiday themed. Often times I get these for $2-4, when I normally would have paid $15.