Get a chick's hair thing (a scrunchie?) that matches the color of your guitar. Stretch it over your guitar's headstock and leave it right above the nut. Whenever you want to go into tapping, just slide it past the nut over the first fret. When you're done, put it back behind the nut and resume playing as normal. MAKE SURE THAT IT MATCHES YOUR GUITAR (i.e. - don't get pink unless you're secure)
"You must stab him in the heart with the Bone Saber of Zumacalis... well, you could stab him in the head or the lungs, too... and the saber, it probably doesn't have to be bone, just anything sharp lying around the house... you could poke him with a pillow and kill him."
- Aqua Teen Hunger Force, The Universal Re-Monster