I have a few more running tips for you that my friend shared with me when I was starting...
Make sure you don't swing your arms across your body when you run or walk. Move them the same direction as your legs. I have read to mimic the movement of leg with your opposite arm. I can't focus on that though when I run. I am sure I do it but I really don't want to focus that hard, I know it works for some though.
When you are having a hard time breathing or developing a cramp, breath in once through your mouth so that you get enough air and breath out two breaths before inhaling again. This sounds silly but it really helps.
I also want to make sure I was clear about somethings on my last post...
Push yourself and always try to make some progress. Pick a point ahead and try to make it to that spot.
Not everyone is lucky enough to live near such a great trail. Find something else you love about running. I find that even a new sports bra from Target gets me out on the trails some days.