Hi Heather,
Depending on how big you want to print.
With 4x6s, I don't do all that much. - just make sure I calibrate my monitor and get a good preview .
With 8x10 or bigger, I start to zoom in closer to make sure the details are up to par. By that, I mean I'll check the noise level, sharpness (where I want it to be sharp)
.
I save jpg with level 10 (in PS) or higher to avoid compression artifacts.
If I upsize the pictures for big prints, I'll spend even more time in PS to make sure all the little details gets cleaned up.
That's all.
Cheers
Ray