Good drill that i've just been jerking around with is the usual "Segal Kicks" every now and then i will snap one off and see how high it is. problem is its kinda hard to get it down pack, at least the silva one is. but the crane kick i have no problem with.
but anyway, the drill for me usually involves shadowboxing while i watch a fight, and where ever i see an opening; be it when the opponent is attacking or whenever there is a stand still, i throw it. it seems stupid but the next day i actually caught someone with it. it didnt knock them out it just grazed them. but it still worked.
ALSO, to not get caught after the kick throw a small little stiff jab or right. always want to make sure when you do a high risk maneuver(sp?) you at least have insurance.
BOW TO THE KING