Today, I install Octopress, it is wonderful.
I follow the official docs
setup
deploy
config
blogging
and the other two blogs:
Octopress介绍与安装
使用Octopress将博客从wordpress迁移到GitHub上

The following command is in common use(in the project root directory):

rake new_post["title"]
rake new_page[super-awesome]
rake new_page[super-awesome/page.html]

rake preview
rake generate
rake deploy

git add .
git commit -m 'your message'
git push origin source

Add a about page

rake new_page[about]

Then I modify main navigation, edit
source/_includes/custom/navigation.html

<ul class="main-navigation">
<li><a href="{{ root_url }}/">Blog</a></li>
<li><a href="{{ root_url }}/blog/archives">Archives</a></li>
<li><a href="{{ root_url }}/about">About</a></li>
</ul>

Also see theme/template