Audience of Strangers

I am discovering, lately, that there are a whole lot of blogs I like to read. Not all of them have RSS feeds, and there are so many that my webcomic solution (enter links to all comics that update on $WEEKDAY into one folder, open all tabs in said folder on $WEEKDAY) wouldn't work, even leaving aside the fact that they don't all update on a regular schedule or the same schedule or....

How do you guys sort out your blog reading? Is there a really simple Firefox plugin I am missing, or something?