Seeing as one of the painters just dropped his ladder and that as a result she will certainly be up again any second, here goes;
1. Leave your $100 dollar US bills at home
The counterfeiters have gone out and spoiled the fun for the rest of us! The $100 US bill is so frequently and convincingly faked that they are all but useless over here in France. Even the banks won’t accept or exchange them. Leave them at home and bring your ATM and Visa or MasterCard instead.
2. Vendors at the Market generally only accept cash
Don’t try paying for that artichoke with your Visa card if you don’t want to become the butt of the jokes constantly being flung around between the market vendors. Bring a fistful of euros instead.
3. Realize that Money is as Close as it Comes to a Taboo Subject in France
I have found that North Americans talk about money much more freely and casually than the French. It is not uncommon to have people spin off the price they paid for a new home, or the price they sold their condominium for within the first few minutes of meeting them.
Keep in mind that the French are generally very closed-mouthed about finances, and consider money matters as first and foremost private matters.
If a French person confides in you the details of their personal finances they are either very atypical, or they trust you very much. In the latter case, you should feel flattered.