you can read Bloom County and Opus online. every saturday morning i read a weeks' worth of my favorite comics. i recommend Get Fuzzy as well. nothing like starting your weekend with a little dose of absurdity, all wrapped up in a speech bubble.
http://www.gocomics.com/bloomcounty
http://www.gocomics.com/opus
http://www.comics.com/comics/getfuzzy/index.html