Right now I run alone, and I mean totally alone.  For about 8 months now I've been getting up and running at about 3:30 am about 5 days a week, and then I eat and get ready for work.  There's absolutely nobody out at that time, barely any cars on the road so I run in the middle of the street, and the best part is it's completely silent.  It jumpstarts my energy for the day and I get a ton of great brainstorming time for working towards my goals.