I sorted all the cards in my wallet. One pile for all my reward cards. Another pile with important cards I need and absolutely use everyday. I only put back the pile of important cards into my wallet. That instantly shrunk the size of my wallet in half.
I took my pile of rewards program cards and punched a hole in the corner and put them on a key ring. I put them in alphabetical order (although the small cards I put in front for easier access because they are so small).
**If you do this, be careful you don't punch a hole on any important card information, such as, card numbers, or the black strip on the back of the card.
I went from a huge thick three fold wallet down to fit everything into a pretty purple clutch wallet. It works wonders for me!
I even get compliments on how neat my organization system is for my rewards cards, when I am checking out at the store.