This is a very basic question, but in the implementation it could be a very technical. Sometimes people imagined that blogging is a complicated thing, or a difficult thing, but actually it’s just like a write a diary on online media. If you can write on your book, you are ready to start a blog. In the implementation, you will need a good concept of your new blog, especially is the main topic, you have to define a specific topic that you love it and you can get so many resources out there.
I’m talking about how to start a blog for making money online with Google Adsense or something like that. You will not learn from me, I’m just a newbie blogger, but I will share about one thing that you must know about blogging for money and how to win the search engines war.
There are so many resources in the internet, you can read and do some practice with your new blog.
The resources, how to make a good concept for new blog :
Problogger
Copyblogger
Bloggingtips
Daily Blog Tips
Research, get a niche and find out the prospect :
Google AdWords Keyword Tool
Google Insight
Google Trends
Technical, improve your SEO (Search Engine Optimization) skill :
Google Webmaster Blog
Matt Cutts
Seomoz
Google Webmaster Help
Search Engine Land
Why I choose Google? Google is the biggest search engine and the best market to get millions of visitors. Remember, blogging is NOT an instant process. Start your blog now, keep it up to date, and let it grow. I recommend WordPress for blogging engine, it’s easy to use and I think it’s the most powerful blogging platform in SEO.
One last thing,
More pages are indexed by Google means more visitors coming to your blog. More visitors means more earnings. 
