It is difficult to answer because it depends on the type of blog platform you use.

It is difficult to answer because each blog platform has a different way to go about it.

Daisybrain is an entertaining blog on the Wordpress platform.

This is difficult to answer without knowing the type of blog platform you're using.

It is really difficult to give advice as to how to customize a blog without know what is the specific platform.

Any platform should have some kind of documentation of how to use it and design it.