Well, don't you do a lot of breathing exercises before class?
Focusing energy in your palms? These are the ki building kokyu exercises, most dojos do them.
Then you do tenkanhou. and (morotedori) kokyuhou.
"Breath throw" at the moment of the throw, arms out palms up, breath in this position, and you will start to feel lots of nice tingly ki in the palms of your hands.
Next, tegatana which focuses that ki forward.
Didn't they teach you this?
Then shower, eat, sleep. Repeat.