50 miles and counting

Well since I took running back up I have ran about 50 miles in the past 4 weeks. That isn't terrible, but this morning I am discouraged. I just ran my lastest trail (3.6 miles) and I knew I did not put my full effort into it. I finished running and felt like I was wasting time. You just know when you are dogging something - technically you are doing it but in reality the effort is disgusting. I was reading stuff from Dean Karnazes and it just motivated me to go out there and run harder. Give it my absolute best. My goals aren't as lofty as his in terms of running, but I have decided on one. I would like to get myself into good enough shape that I can run a 10K (6.21 miles) on my long run day each week in less than 45 minutes. I've got a long road to get to that point, but I need some sort of goal so that I don't go out and slouch my way through my workouts. Running continues to feel good. My knee is a little sore - but mostly from tiredness any real aches/pains. Wish me luck!