Another trick
If you have a conduit (pipe) with no string in it, you can get a string into it using an ordinary vacumm cleaner. Fashion a 'birdie' from a scrap piece of rag, not too big, just big enough that you fold it over and tie a string aroung the fold so that it fits into the pipe but not real tight, then attach your string to the birdie and apply a vacumm to the other end of the pipe, allowing the vacumm to pull the birdie through the pipe. Of course, if theres a pull box in there you will lose the vacumm so you have to do this at each pull box, but, when done right it is a lot easier and will save you some time over the old 'fish tape' routine.
