Professional blogging means doing blogging as your full time source of earning. Turning to professional blogging is not a big task if you have experience in blogging for at least one year.

First you need to do is buy all premium services. Because all the free services like blogger have some restrictions which restricts your creativity and harms you financially. You need to spend most of your money on buying host having all the one click facilities and technical support. Other is buying domains, which needs money to spend.

Writing blogs will become the only thing you have to do, when you turn from part time to a trained professional blogger.

If you have enough knowledge and good writing qualities then you can get offer to write as a paid bloggers to write on other’s blog. But to prove this , you should have a well established blog as well as it should be full of rich content in it, which can be served as your demo of work.

You can find many of the web resources from search engine, where you can find freelancing blogger jobs. What matters most is your writing qualities and not the supports you have from your own blog.

Following things should be considered while maintaining your professional blog:

The blog should be self hosted, and not dependent on any other services/ organization.

Your blog should have attractive and professional domain name like .com or .org

Keep Your content copyrighted and keep it updated for better security of your work.

If you can’t make a copyrights easily then at least have a creative commons sharing license, so no one can steal your data.

Start managing more than one blogs, for that you can use handy softwares.

Experiment on blogs, make analysis and try to improve it each and every day.

Increase your popularity as a writer, by writing some best of your’s articles on Ezine or Article Wizard.

Before turning to professional blogging, make a analysis, that you can do work independently, and also invest some money.

Don’t suddenly quit everything and start blogging only, make sudden change, because it will allow you to survive in bad times.

I guess that is enough consideration you should focus on for being a professional blogger.