Use duct tape!
Simple duct tape treatment is more effective than liquid nitrogen freezing for common warts. This study of 51 patients compared standard liquid nitrogen freezing (cryotherapy) to a treatment which consisted of covering the wart with duct tape. In the liquid nitrogen group, 60% of the warts were cured, but duct tape treatment eliminated 85% of the warts within the two month limit of the study. The warts that responded to treatment usually did so within the first month of either therapy.
The duct tape treatment is done in this manner: cover the wart with duct tape (chosen for its sticky qualities) for 6 days. Leave the tape on, and don't remove it even for bathing. On the seventh day remove the tape, soak the wart in warm water and gently abrade it with a course emery board or pumice stone. Allow the wart to dry and harden again overnight, then reapply the duct tape for another 6 days. If the tape comes off before the sixth day, reapply it. Repeat this cycle for a minimum of 4 weeks treatment.
http://www.drhull.com/EncyMaster/W/warts.html
Basically, what you need to do is put duct tape on the wart for six days (to two months, depending on how subborn the wart is), then remove the wart easily with a pumice stone or something rough - like sandpaper. Save your money on all of those doctor visits or nasty, poisonous over-the-counter wart remedies. Buy a roll of duct tape and do it yourself!
http://www.octanecreative.com/ducttape/hmo/