How to start writing?

There are lots of thoughts inside me which are dying to come out. All the while I never had any outlet to bring them out. Have been adviced couple of times by many of my friends that starting a blog is a very good idea and i often thought of considering it. But its been lately that I have noticed the importance of blogging. Not only does it give an insight to a person about your nature and thoughts but its a very good medium of displaying your thoughts to the outer world. I hope I am regular at it.