Traveling to Paris in a few weeks... Help Please!

I'm French and I use MFP everyday, barcodes definitly work here
However, I think you should really enjoy yourself, it's only one week

Being on your own in Paris is probably not a danger to your diet, as long as you keep moving and avoid sedentary activities. Try to enjoy your food, and take time to eat and enjoy it. Don't sit down and eat in a hurry - I believe it is considered rude for a waiter at a restaurant to rush you.
I understand that "fast food" and "convenience food" availability has become a threat to some Parisienne's svelteness; however, I have found that I am immediately recognized as an American when I am in Paris because I am overweight (blush!).
One thought - don't eat 'every day' food there - so nix on the trailmix and the hershey bars and the McDonald's. Try some of the wonderful varieties of yogurt and cheese available.
Also remember that being tired won't be solved by eating simple carbs.
Carry water.
Oh, by the way, if you are near a Berthillon's don't hesitate to try it at least once. Also, around now the flowers in the parks should be starting to bloom, so be sure to check.
Wish I had taken my own advice - my last vacation included a cruise, and I have just today managed to get back on track.
Have fun!