try group running if you can get others to run with you, it helps alot with motivation. you can do indian runs where you run in a line and the person at the back sprints up to the lead ans so on, mark out your run area so you can sprint 100 meters then run 200 meters then sprint 100 etc.
make sure your running area is marked out be the quarter or even to the eighth mile. each quarter mile should be about 1 min 40 secs.
make sure where you are running is even and flat, your time will vary greatly with hills.
find someone who can run a 13 min 2 mile and pace off of them, this also cuts down on wind resistance.