My wallet is a nightmare of small plastic cards from loyalty programs to essential pieces of ID. Should it go missing it would be a huge nuisance to remember everything I have in there.
So do yourself a favour: Find a photocopier, place all your cards down and press the copy key twice. Write down any of the numbers that didn't come out clear onto the page. Jot down the toll free numbers that you can call to report missing cards.
Tuck it away - actually make an extra copy and leave it with someone you trust. That way when you are far away from home you can make one call and have someone help you stop any further damage, identity thief or misuse of your information.