Many of us, being bloggers, read a large number of blogs each day besides our own. Some of these are blogs that we subscribe to, others are blogs that we read once and never think about again. What is the difference?
What makes you willing to go back to a blog more than once, or even every day or whenever there is a new update? Frequency of posting is one factor since there is no point in returning to a blog if there is no new content, but there is more to it than that. So what makes you want to return ?
Finally, do you have a prefence for subscribing? My personal favorite is the "Follower" method on Blogger. It is simple and quick, although does not work with non-blogger blogs. I have not really figured out RSS. Other options include saving the page as a favorite and signing up to get updates e-mailed to you.