Making My Blog More Marketable?

Well if I was looking to make my blog more marketable I would want to make it as interactive as possible. Once people are here, I want them to stay here. I want to give them things to do such as engaging in polls. If I were to seriously run a blog I would want it to be involved around indie music, so I might have weekly or daily polls asking people to vote on their favorite new artist. Other things I would like to do would be to create unique content specifically for the blog. One indie music blog I follow produces live sessions of indie musicians and then presents them on their blog, helping them create a following because they are creating their own unique content.