Richard Bejtlich has a really good blog post on his blog entitled "why blog".
He lists five things:
- Blogging organizes thoughts.
- Blogging captures and shares thoughts.
- Blogging facilitates public self-expression.
- Blogging establishes communities.
- Blogging can contribute original knowledge faster than any other medium.
I mostly keep the blog as my note taking canvas (for notes I want to share with others) but RB's five reasons are reasons I blog as well.