Packing
Packing is a huge deal for everyone. It is a huge question of what to pack. I cannot make a guarantee on weather in Paris. I can only assume it will be hot but there is no guarantee and last summer was proof.
What I suggest is bringing things you can layer. I also strongly suggest packing one suitcase because I will not lift your suitcase for you. I have my own to deal with. : )
I have put in this a packing checklist. Remember how I feel about travelers checks: I hate them. They are a waste of your money unless you have them as emergency funds. You need to pack in your carry on prescription meds. This is EXTRAORDINARILY important. Granted, if your luggage gets lost, things can be replaced, it is annoying and a financial burden. If you need it, pack it in the carry-on.
I highlighted and underlined essentials. Everything else is up to you. Don't overdo it. Trust me. There will be things you asked yourself why you packed after this trip.