I've got 16 cc's + 2 debit cards + 2 Bb's + 2 tmo's + any number of prepaids.
Probably 8-10 of my cc's are always in a sock drawer. And when I travel I only take 2-3 cc's + a debit card with me.... mostly because if I were to lose my wallet I don't want to have to deal with trying to remember all those card numbers nor the hassle of calling 8 different card issuers.
It was bad enuf three years ago (before my points/miles obsession) when my wallet got stolen and I couldn't remember the number on the ONE card I had... stress can do funny things.