The French shake hands more than any other culture. When you meet (whether this is the first time or not) use a complete yet quick handshake. It should not be too strong like a bone crusher or pumper handshake. When you depart company you would also shake hands the same way.
Kissing between friends, family and long-time colleagues is common. The French kiss twice starting with the left cheek, then the right. If you are not French, don’t initiate the kiss but be ready to respond is it is offered to you.
Wait for a woman to shake hands first.
Don’t be put off if your French counterpart doesn’t smile when meeting you for the first time. They are not trying to be put-offish but instead dignified and polite. The business culture is especially formal in this way.
Always be prompt for appointments. Punctuality is quite important.