A strike that is often not very well explained is the Ridge Hand Strike. The focus is usually on striking with the hand, making it of limited use under pressure as it requires quite a lot of accuracy and the small bones in the hand can be damaged if they strike the wrong target.
A simple modification to focus on striking with the forearm makes it more powerful, requires less accuracy (very useful under pressure), can be used at multiple ranges, reduces the chances of damaging yourself and can flow very easily into other applications.
Please check out the video below for a more full explanation.