hahah i use keelyn's food as "treats" i don't necessarily say treat, but I take it from her food bowl and do it.
Sit happened pretty fast, basically you make them want what's in your hand and eventually after jumping on me to get it she eventually sat down and I gave it to her and the good girls started rolling

. Down took a little longer. I mean I am no master by any means I kind of just do what works haha. She has now mastered roll over and "high five"

.
For paw I just take her paw without her doing anything and saying "paw" and say good girl! over and over and eventually she caught on and started tapping my hand on her own!