Running effectively.

[sports_brah]

I've got a pair of running shoes, and a spare t-shirt and pair of shorts, and I'm looking to increase my running time quickly and effectively.

Ultimate aim (long term is a half marathon, may one day a full marathon), but for the short term is to be able to run 1.5 miles in 9:30 or less.

The sensible thing is just to keep running, but I was wondering if there was a scientific way of going about this? (eg should I be going for long distances, or sprinting to build up speed etc?)

Thank you.

 

[sports_brah]

I've run before, but not particularly well (4 miles at a time)

i find that my stamina/endurance goes down ridiculously quickly as soon as I stop running.