Choose content that will last for a while. This can be difficult depending on the style of your blog, but if you focus on writing articles that aren’t ‘trendy’, you’ll likely have many more readers in the long run. If you’re writing about a fad, insert it into an article that will likely stay popular for more than a few months. In this way, you can almost guarantee future readership, especially if your page gets plenty of hits to start. Writing about things that are popular in the moment may give you a short burst of readers, but after a few weeks the number will likely dwindle significantly.
Respect other websites. People get very annoyed when it's clear that someone is using their website solely to promote a different site. If you're going to blog walk, make thoughtful comments on articles you found interesting. If you're posting in forums, read the rules and participate in discussions. Don't post just to get another link to your blog out there.
Traffic is one of the most important parameters for your blog; the more people who find your blog, the more people who will read your ideas. If you're ready and willing to have your blog admired in the online community, then try a few different methods of increasing blog traffic. You'll create better content in the end, and probably have dozens of new viewers each day.