Just some standard things, I guess :
Pace yourself : Listen to your breathing, meaning if you're breathing is too heavy slow down a bit. Don't start out fast and end up exhausted in a few minutes, start slow, if you can handle it you can go a bit faster.
Keep a routine, just go twice or three times a week, that way your muscles can strengthen. (20-30 mins a time)
Eat well on the day you're going to run. Don't eat two hours before you run.
Keep your arms to your sides, try to touch the ground lightly.
Keep practicing (I think you're doing that now)
Control your breathing, inhale through your nose and exhale through your mouth.
You really shouldn't focus too much on speed right now, you're increasing your fitness level. Racing can come later. During your training, always, and I mean always stretch after you run. It will allow them to become stronger and faster. And please, warm up first, then stretch a bit, then run and end with stretching again. Stretching can cause injuries if you don't warm up first. Don't skip the warm up, and walk a bit after you run.
Very important : Stay hydrated. If you feel a bit thirsty, it means you're de-hydrated. Don't drink only water, drink electrolyte drinks too.
Oh, and read this : http://www.active.com/running/Articl..._Every_Day.htm