I think it's OK to "call in the cavalry" from time to time. But each time you do consider using a car, stop and think for a minute, "How could I do this task without a car?" Chances are, you'll start coming up with more and more alternatives. I used to bribe friends to drive me pretty regularly, but now it almost never happens.
Also, if you cant' think of an alternative to a car, start a thread here. I bet people will come up with lots of options, some of them even useful.
