Ever had the problem that your have too much stuff in you wallet, too much cards, too much coins, etc… I just eliminated these problems by just using a wallet money clip like this one
Every time when I get coins back as change, I just drop them in my pocket and at home I just put them in a box, before that I would always keep them in my wallet until it got more bloated. This wallet saves space and reminds me just to keep only the necessary cards and not get more and more cards (e.g. membership cards to get a discount. They steal too much time compared to the amount of money I would save). Thanks to @levelsio to make me start think about getting a wallet like this.