I've lost that running feeling..oh that running feeling

Ever since the 1/2 marathon I have not felt like running (or working out at all).  I did run with the Tuesday running club, but that has been about it.  I am sure it doesn't help that I have been a bit congested (I have just discovered the joys of Musinex).  So I am hoping that will clear up soon.  But really there has been no reason why I just don't want to do anything.  I brought my running gear for the last two days to work, thinking maybe if I lace up after school and don't come home until I run that will work.  Well it didn't.  My running stuff is still sitting behind my desk and to make matters worse I just realized that I didn't even bring it home lol.  I think I will make myself head either for a run or the gym on Sat. morning.  Then I will be looking for some new runs to run.  That seems to be the big motivator for me, running races.  How does everyone keep motivated?  I am hoping that I will just wake up and think I need to run now!!!  But as of yet it hasn't happened..