While there are many ways to monetize a blog, Google Adsense is one of the most common and the most popular.
Having trouble getting your account approved with Google? You should check out this piece I wrote on About.com: Google AdSense Approval in 8 Steps.
Double Your AdSense Earnings in 5 Minutes a Day
The following infographic by WhoIsHostingThis.com breaks down the following five factors: ad size, ad placement, your content, ad blending, and test & test again. If you are using AdSense on your site, this is going to help.
Now It's Your Turn
The question about blog traffic always comes up when we talk about monetization.
Some feel that lots of traffic is needed first. I disagree.
What do you think? How much blog traffic is needed before you monetize?