Check out flyers at museums & libraries

Generally, the smaller more specific theme-oriented museums here allow for brochures or flyers coming from external venues, so you can find out about other events in town within the same interest. Example: Went to the Palais de Tokyo last night, and even though the expos themselves were closed, the lobby area with restaurant & gift shop were open. I found a rack with little flyers from other art places... including one for a contest I might end up entering. :) Public libraries also tend to have flyer/brochure racks. Keep a look out for them because you might find out about awesome events you would not otherwise discover.

Fighting off the winter blues....

Paris has a winter that is indeed wintery - uncomfortable and energy-draining - like all winters in cities above (and below) tropical latitudes. The winter temperatures are fairly moderate for how far north Paris is situated, but it is cloudy on most days, rainy fairly often, snowy occasionally, and humid. For these reasons I would not recommend vacationing in Paris in the winter, but if you do make sure to pack a winter coat, a nice pair of flat, waterproof boots (trust me on this one ladies), scarves, gloves, hats, etc and an umbrella. You want to be prepared for a cold front, even if you may end up not needing all this wooly paraphenelia.

If you're finding yourself feeling a bit out of your element during the colder months, take care to continue eating well, exercise as much as the weather will permit, and not hermit yourself in your apartment (like my confused/cold floridian ass did). You need as much stimulation, if not more, to get through these months, even if it does not feel as natural to seek it. So go out and explore again and again... even if you think having been to the Musee D'Orsay 4 times is enough, you might find a painting you missed, or there might be a new expo open.

Take advantage of museum nocturnes (evenings in which the museums are open late). Generally museums close from about 17h-19h (5pm-7pm) but about once or twice a week, many museums can stay open till 22h (10pm). I'm finding the nocturnes to be particularly relevant in the winter time, as the sun sets pretty early. Save the day time for walking around the city and absorbing what little light can be found, and get your cultural fix in the evening juggling the different "noctures." (L'Officiel notes the nocturne days.) That way you won't miss out on your art needs, or the sunlight (that may be often filtered by clouds, but regardless, it is better than no light).

L'Officiel - Art Gallery / Museum Guide

If you're into art and you're in Paris for a week (or more) I would highly recommend purchasing a little magazine called "L'Officiel - Galeries & Musées." You can find it at tabacs or possibly even bookstores like the Fnac (I'll double check this next time I go). Right now it costs 3.50 euro, and it spans two months - worthy investment, I think, but you can always do the flip-through-and-jot-things-down if you're short on change.

It has a pretty exhaustive listing of the galleries in Paris and maps for your gallery-hopping needs. Towards the end, you'll find a complete listing of art museums and their ongoing expositions (including addresses and opening times of the museums). I'm pretty excited, I just bought the first today... think I might indeed absorb some art this weekend.

The website of the magazine is also here:
http://www.officiel-galeries-musees.com/web/

In fact, now that I'm looking through the website it looks like they have all of the information posted (minus the articles in the front) so it might not even be worth buying unless you want a handy guide to take with you on strolls. :) But do look out for it!