What is the best way to earn money through blogging?

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Blogging is one of the safest and a real way to earn extra money online. As a blogger, and sure some of you also do blogging, what tips could you give us to increase the blog's traffic (or i mean the people visiting the blog) and also ways to earn through blogging. I use Google Adsense as of the moment and AdBrite. Adsense is better than the latter, any tips or advice anyone?