Listen and Learn
Do you miss going to school? Probably not. The homework, the long classes, the lunchroom drama...but what about those interesting lectures on topics you've always wanted to know more about? Are you curious about consciousness? Would you love to learn Latin? Try a podcast! Educational podcasts are posted online by colleges, high schools, companies and regular folks who want to share what they know. You can put them on your Mp3 player or listen to them on your computer.
Podcasts are audio files (usually Mp3s) posted on the Internet that you can download and listen to. Podcast Alley has a more complete explanation here.
Podcasting directories have lists of educational podcasts. Here are a few to get you started:
Podcasting Station's list of Educational Podcasts
Stanford on iTunes (requires iTunes)