There are a number of ways to make money with blogs.

* Create a website associated with the blog and work the two together. (Search engines eat this concept up in you rankings)

* Setup a loyal list of readers by creating a free newsletter through an autoresponder service like AWeber. Check out this page for a free test drive of their system to see if this will work for you.
===> http://search-engine-optimization-and-beyond.com/A-Internet-Marketing-Resources/Free-Gifts.htm

* Listen to this free audio file that I normally charge others for that focuses on this exact topic.
===> http://search-engine-optimization-and-beyond.com/A-Audios/single/BlogProfitMo.htm
Be sure to join my free newsletter list while listening to the audio, because you will be glad you did.

* Check out affiliate sites like Clickbank & Commission Junction to see if it makes sense to join their services into your niche.

* Never stop marketing your blog with Web 1.0 & 2.0 strategies less you end up with a golden nugget that no one knows about.

Hope those are some helpful ideas for you.