Most blogs fail because beginning bloggers don't understand that it's difficult to come up with new content day in and day out. Sure, it's easy enough to post a "Didn't do anything today" lament or a "Don't feel like writing today" sigh. But post too much of this content-free blogorrhea—or, sin of sins in the blogging community, don't post at all for long periods—and your blog is as good as dead.