I wanted to go the the Musee D'Orsay on Sunday but I wanted to avoid the Sunday line-ups. While still at home, I found a link on the Museum's website for FNAC to purchase my tickets ahead of time.
I ordered my tickets on-line. Seamlessly. And arranged to pick them up at the FNAC Digitale location at 77-81 Boulevard Saint-Germain.
The location was so central; extremely close to the intersection of Boulevard Saint-Michel. The store itself is like a Parisian version of HMV or Future Shop, which is confusing enough for me but apart from being in a parcel-pickup line for a while before I saw the sign for Ticketing (Billetterie), all went smoothly, except for when I dropped a pile of pamphlets on the floor.
You can order your tickets for just about anything going on in Paris or the whole of France through FNAC. Concerts, comedy, balloon rides, cooking classes. I'd recommend having a look by clicking right here for FNAC.com
Image from coeurdeparis.com