Watch the Tapping With Pick online guitar lesson by Chris Buono from 60 Electric Guitar Techniques You MUST Know
An alternative to tapping with a pick hand finger is to tap with your pick! Tapping with your pick enables you to play what sounds like a hyper speed trill. If you're looking for a quick flurry of notes for maximum wow factor, tapping with a pick is the way to go. When you do so, be sure to turn the pick over and use the top.
Looking for inspiration? Whenever I think of tapping with a pick, I hear Joe Satriani and what he does in "Surfing with the Alien" among so many other instances with this technique. Speaking of tapping with an apparatus other than your fingers, be sure to check out Bumblefoot's completely unique thimble tapping technique!