I am preparing an adult class, open to community members, with a general theme of using the web to save money. I'm in the outline phase, and have many ideas, but I thought I would put the question to a larger group of creative minds...during these tough economic times, how have you used the internet to simplify your life and/or save money?

I have some basic stuff, such as:
Local News, weather, sports
Podcasts (check iTunes' list)
Tons of free content
Craigslist
EBay
Netflix
Hulu -free TV/movies
Good old email
Online banking
Mint
Skype
Upgrade/repair household items instead of buying new
Google docs/open office
Other free software
AV software
Picasa
Gimp
Free wallpaper
Delicious bookmarks
Google maps/trip planning using a gps/phone
Find cheap gas
Review products first: consumersearch.com
Home security
Get a dog
DIY security kits
Calculate electric savings
Free healthy recipes
DIY info and tips online
Ebooks
many are free
many libraries offer downloadable ebooks/audiobooks
Cheap computer classes online

Thanks in advance for your ideas...
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Improvise, adapt, and overcome