I suck but pop shove its are something I can do pretty well, so I'm going to try to help.
The usual tips apply (shoulders parallel with the board, etc), bend your knees, etc.
I put my front foot somewhere between a heel flip and an ollie. My toe hangs over the edge of the board just a little, and I put my back foot in the center of the tail, both are to prevent the board from flipping. I pop and scoop in the direction I'm moving, not back behind me. I jump straight up, not forward or backwards, and land with my knees bent.
I'm sure everyone has their own ways of doing it. You'll probably find yours. Good luck.