I ran my whole life until a knee injury playing basketball last year. Keep your form up and stick to your pace.
I had to move to cycling which is nice. Not hard on the body and see a lot more stuff since you go a lot farther distances. I try and do 25 miles a day but have done 50 and 70 miles.
As a runner, the most I have done was 10 to 15 miles when I was in high school. I always did the long events in track and ran cross country. And in the army, I loved the long run days. I love running