a painful subject for me. i have really strong hair on chin and neck and, like cherry mentioned, it makes me stay at home many times i would like to be somewhere else. i'm even afraid i lost some friends due to 'i can't come see you today because...' and then make something up day after day. i have had this problem for most of my life (i'm 33 now, and this hit me at the age of 14 or so) so it is painful and frustrating to even write about it.
anyway, back to removing the hair: i use warm wax. i live in europe and you can buy it here in specialized shops, don't know if this kind of wax is available in the US.

i wax every two to three weeks, since the hair grows faster in the summer and much slower in the winter. warm wax spreads the pores and makes it easier to pull the hair out and once it's pulled out, i usually go ten days (less in the summer) without it showing at all. it grows slowly, it takes more then a week for it to grow long enough i can wax it again. it has to be at least three to four milimeters long (0.12 inches according to google

), i'm afraid. drives me crazy.
i would, however, like to stress out that it is very much individual how long it will take for the hair to grow long enough, it depends on how active your hormones are, how strong the hair is... but it really has to be pretty long to be ready for waxing.