Before I forget...
I confess that I took pages from my RS Paris 2011 guidebook, so anyone that has a more recent copy feel free to correct this. The 2011 directions for Musee Marmottan Monet say that as you depart the metro stop La Muette "cross the street and follow the brown sign". We could not find the brown sign, and we looked...and looked..and wandered. So, if you use the La Muette metro stop, when you get to the top of the steps, bear left (you can cross the street to your left and then turn left) down Charisse La Muette. Also, there is no cafe there currently. This was our first stop off the plane after dropping our luggage and it was a good choice. We love Monet and this is a fabulous way to see so much of his work without a lot of people.
What I'm glad I brought: Costco lightweights rain jacket. It can fit in my day bag/purse and goes on and off quickly for scattered squalls.
What I wished I'd brought: hand fan. Tossed when I was trying to keep carry-on, carry-on size. That decision cost me 6€ when the lack of air-conditioning got to me today.
I love Monoprix. To all who've suggested buying sundries when you get to your destination, thank you. Price for toothpaste comparable to States.
The Louvre is open late on Thursdays - go late. The difference in the energy level between 12:30 and 3:30 is significant. The number of people was about the same but they were much calmer in the late afternoon and there was no line at the pyramid at 4:00. At 1:30 it looked like a Disneyland clone.
Off to Reims tomorrow.