I've never used a lotion-dispensing one or a wet/dry one for that matter. But with the regular shavers, I find that a moist face isn't good, it causes sticky skin that gets burned. I like to take a shower and then go eat breakfast, give my skin some time to dry out.
Pushing down too hard is no good, going over the same spot 20 times isn't either. Not that I have much of a choice, but I like to shave every day to keep the hairs short, so they can't get long enough to lay down and get much more difficult to remove with a few passes.
Also learn the art of stretching the skin with your free hand to make it more taut and less likely to get snagged by blades, and to get it away from the contours of the throat and neck where it's harder to shave without getting burned. Anything you can pull up above the jawline will give you a flatter surface to shave on, and that has always worked better for me. Also stretch the skin of the throat and adams apple off to the side. The point about learning what spots and what angles are troublesome is very true, and you can stretch skin away from those spots to try to avoid it.