Seriously, in case the title fooled you, it's less to do with the amount of cash you have (unless you carry more than 10k in small bills on a regular basis). It's more about how thick mens' wallets can be due to the items we have to carry everyday.
Well, anyway, I have the following personal effects in my wallet that I bring along ALWAYS:
Driver's license - needed
Three credit cards - needed
Two ATM cards - bring only the more popular one
Two rewards/point cards - not needed
HMO card - needed
Company ID - sling it
Four restaurant discount cards - not needed
SSS - not needed
Philhealth - not needed
A few backup calling cards - just one if this is part of your job
A wad of cash (just 'enough') - oh well
A picture of my family - not needed - giveaway when you're lost...
It's so thick that I have to remove it from my back pocket if I need to sit down for any length of time, or I risk damaging my credit cards and give me a sore butt cheek.
Typically, I'm interested in how you guys cope with it.