Who to follow?

With so many innovative ideas and interesting people out there, it's sometimes difficult to decide who to follow and then what tweets, status updates, blog posts, etc. to focus on.  Here is my tentative criteria for people to follow, going forward, in order of descending priority:

• People that you know personally and who live in the same city - it's nice to be able to speak to people face-to-face and for extended periods of time
• People that you've met in person before but that live elsewhere - it's better to renew a relationship than to have had none at all
• People that work in your organization but that may work in a different location - easier to start a conversation with someone that is somewhat obligated to respond
• People you haven't met yet but live in the same city - potentially you can meet up with them
• Well-known people - you'd like to meet them but if you did, you probably wouldn't have more than an "elevator conversation" with them