Time, Time...

I do a running loop from home that is close to eight miles and the nice thing about it is that I can easily add another four miles at the end. The problem is that I almost never do the extra four.

Time: I don't want to do the extra four if my time for the first eight is bad--I don't want to convert a mere bad run into a disaster.

Time: It seems like whenever I do have a good time going, I have stuff to do and don't have time to add another half hour to my work out.