I generally clean out my wallet before going on big trips, leaving behind some of the things I know I won't need (like local movie theatre coupons or reward cards) and making sure I have the things I will need (like hotel and airline reward cards). But I'm generally not quite this methodical. Some good advice here. Thanks to Julie for the tips!
Are you carrying around security ID badges from three jobs ago? Ticket stubs from 1983? Diner register receipts so faded that you can only guess what you purchased from the color of the faded food stain (ketchup? strawberry jam?)?