You should blog! I've shared my thoughts on why before. Here's my new favorite introduction to why you should do it, in Q&A style from Marc Weidenbaum over at Disquiet.

Here's my favorite bit on the difference between social media and blogging:

Q: Why would I blog if I get more feedback on social media than I do whenever I’ve blogged?

A: It’s in the terminology: Social media is “social.” Blogs are “web logs.” Social media expects feedback (not just comments, but likes and follows). Blogs are you getting your ideas down; feedback is a byproduct, not a goal.