What is the best method to use to activate my tuning fork?

To activate your tuning fork, hold it as close as possible to the end of the handle. For best results, strike the tuning fork gently against a hard surface near where the tines end. Note that you do not need to strike the tuning fork very hard against an object to activate it.
 
Alternately, you can activate the forks by ‘snapping’ the tines of the forks. Place your thumb and index finger on the outside of each fork and then slide your fingers off the tip of each tine while moving them towards each other, as if you were snapping. This motion will set the tines to vibrating.