It seems that one barrier I have to increasing run time is that I may be going too fast.
I consciously try to go slowly but when I check my pace later on Runkeeper it's usually about the same. I'm not mega fast but from talking to a friend who is a good runner she thinks I'm going too fast for me. I can go longer on the treadmill in the gym but with that it's possible to set a pace. I also find that when I try to go slower outdoors it feels like harder work so I'm in some sort of decreasing circle.
Any tips on controlling pace outdoors?