Find a CD and listen to one track per day. Some people can find more than that a little overwhelming. I try to listen to the same track three or four times in a day, and get to know the piece.
Some people call me odd, but I would guess that many on HN fall into the same category, if not for the same reasons.
You can check out track samples from all tracks, read reviews and/or buy it here (this link only good for US):
http://www.amazon.com/Essential-Chopin-Masterpieces-Amazon-E...
Amazons for other countries should have it as well (e.g. UK (costs six pounds): http://www.amazon.co.uk/Essential-Chopin-Masterpieces-Amazon... Germany (3 Euros): http://www.amazon.de/Essential-Chopin-Masterpieces-Amazon-Ex... )
(Note: the track 55 problem mentioned in one review was fixed. Also note, you'll need to use Amazon's downloader, which installs in seconds--available for Windows, Mac and apparently they now have a Linux version too--you should be prompted; if not: http://www.amazon.com/gp/dmusic/help/amd.html).
For an assortment of great Chopin playing, check out this playlist of Rafal Blechacz at the Chopin competition in 2005. He on all 5 first prizes at the competition. http://www.youtube.com/view_play_list?p=01CC65D4BAEF5E85