Where to start?

Ok, I WANT to start improving my run time. It's absolutely horrible!! My run time, as of my last PT test is 15:36. In tech school it was 13:15. I'd like to start by getting it back to the 13 minute time frame and then steadily decreasing even that! So, where to start? I think by running more often. So here are some short-term goals that will, hopefully, lead to my long-term goal:

1) Run at least 2 mi's once a week for a month
2) Run twice in a week for a month
3) Run 3 times a week for a month

That should start me on the right track, right? Then in there sometime, not sure when, I'll start working on distance and time.