I use Blogarithm to help me manage all the blogs I like to read. I was telling a few friends about it so I thought I should just post it. I really recommend it because you just enter the URL for the ones you want to track and they send you an email each day of who has updated their blog or website. The email will give a short intro and then you click the link. I think I am tracking like 50 blogs. Who has time to check all of them to see if someone has posted something new that I want to read?
There are probably some other similar services but I like that I get only one email a day even though it tells me who change their blog the day before.