When you thinking about the blog, a question arrives in mind that "how to start blog?"
You need a platform for your blog. Mostly it is call Blogging platform CMS. This helps you to create the blog and allow you to organize your contents and settings. There are many platform for you to start a blog for you. You need to find which one is best for you. Here is the list

Wordpress

Wordpress is the best CMS blog platform, if you want a professional and easy customizable blog then Wordpress is best choice for you. Wordpress is completely free and you will new updates constantly. For secure, easy and stylish blog wordpress is the best option.

Joomla

This is also an open source content management system (CMS) for blog. It is easy to start, within some time your blog will be online. Joomla makes creating and maintaining blog easy for users.

Blogger

Google is also offering a blog platform called Blogger. Its very popular, free and easy to setup. It has very simple environment, for starting a blog it will be a nice choice.

Drupal

Drupal is also a blog CMS that allow the users to organize and display the content, customize and manage the daily tasks. This system is also free for all users and you will also find many themes and modules completely free.

There are many other systems:
WordPress.com
LiveJournal
Movable Type
Typepad
Weebly
Vox
Blogge.rs
Injader

I recommend the Wordpress.org for best blog because its easy to customize and simple to start