Having an action camera is great. However if you are lacking some of the accessories, the use of an action camera may be a little limited.
These are some of the most useful action camera accessories.
Chest strap mount
Head Harness
J-hook or J Mount to attach camera to a chest harness or helmet mount
Wrist Strap
Floating Handle Grip
Handlebar Mount
Suction Cup
Many companies sell these accessories together with a range of connectors as bundles. This is usually a much more cost effective solution than buying them individually.