When someone is about to punch you in the face, don't wait for it.

Do something about it!  Move, block, punch back, anything.  Don't just sit there and wait to get punched in the face, unless you want to.

Sometimes it isn't something you can practice.  It's something you just have to do.

Any amount of practicing just one thing cannot prepare your mind for a broad range of things, like just doing something can.