What would be a good way to take care of a plantar wart?

Warts: There are many different treatment options for warts... Mostly because nothing is guaranteed to work 100% of the time. A physician may try things like salicylic acid, cantharone therapy, cryotherapy, laser or surgical excision. If a wart is resistant to different treatments, it might be a good idea to take a biopsy of the lesion to ensure that it is indeed a wart.

Several treatments.: You can try over the counter wart removers, but be careful: i've seen them do more harm than good. Other options your doctor might offer include cryotherapy (freezing the wart), electrocautery (burning the wart), laser treatment, or several different topical chemical treatments. If the treatment is typically uncomfortable, your doctor can numb the area before proceeding.