I buy a pack of Velcro self adhesive sticky tape. Cut a small piece of the velcro hook side and stick it to the pick - saves it slipping ou tof the fingers. Cut a similar sized piece of the felt side, and stick it to the underside of the guitar neck. ( it comes off with a hint of white spirit without damaging th finish)
When not using the pick attach it to the felt pad!
I have two or three attached to every guitar and banjo I have, not bought picks for years!