I am about the same as OBG, I keep $100 to $200 in my wallet and am a believer that cash does really help "Seal the Deal". I also keep $25 in my other wallet (Credit Card / Work ID Wallet) just in case I loose/forget my main wallet.

The problem I have is that my DW never carries much cash, so when she needs some, she just takes it from my wallet (which is stored on top of the fridge). I usually know when she has done this (she never closes it correctly) but it can leave me short at times.

We have coins in Canada now up to $2 and I usually spend this at coffee shops. Last Christmas my son bought me a swipe card for use at my favourite coffee shop (Tim Hortons) I keep it on the visor of the truck and it is much easier than digging for change when using the drive thru.

Mike