Join a book club. I see you are in St. Paul. Most of the St. Paul public libraries have at least one book club. Bookstores often have book clubs, too. The Barnes & Noble off of Ford Parkway has a couple. There are even "virtual bookclubs" where people chat online.
BBC and NPR are great to listen to. It reminds me that there is life outside of toddlerdom. ;-) You can stream many stations through your computer. Also, BBC and NPR have a nice collection of podcasts you can listen to anytime--some of them are quite interesting.
The Teaching Company's and Professor in a Box series both have some great products. Basically, it's a college-level course on DVD and/or CD. The library has some good titles.
We are lucky here in the Twin Cities. There are LOTS of free and low-cost groups that meet, for everything imaginable: hiking, knitting, breadbaking, sports, foreign languages. Just do a google search and so much will come up. Let me know if you need any URLs or more info.