Snap shooting in the mirror, but make sure your doing it right the first time or you will be learning something thats wrong and grow to have bad habits.
Switching hands with your marker in hand, a good one i do is switching hands but at the same time going from standing to kneeling then back up and vice versa.
Potting up, way i did it was fill a pot and tape it so the balls cant fall out but you can open and close lid, this way you dont have to keep uploading your hopper but still get the feel of potting up.
These might be useful, might not be but meh ive got loads of **** i do at home when im bored.