Highly recommend Fred Asbell's book referenced above. Buy a couple extra copies and give 'em away as presents.
Every deer hunter should teach himself/herself how to ground hunt. Example. My stepson just took up hunting, got some good land to hunt, put up a bunch of trail cams. His first report back to me was: "Man, where the deer like to walk has a bunch of brush and no good trees." My answer is: "yup!"
I've tried lots of stuff, but find natural ground cover to be far superior to camo-cloth. But, by all means, experiment.
Never forget the virtue of the sun behind you and a large cover such as a huge tree behind you. I also like broken cover in front.
One experience was at sunset with the sun behind me as well as a huge oak, otherwise I was completely open to a cut bean field. Darn buck walked to 15 yards, put his head down to eat beans and never saw me. I was shocked.
Another favorite is cutting a hole in the center of a patch of goldenrod, with a shooting lane. Works great, but even there, you have to be perfectly still. This method can be used with cattails and other such brush to great effect. But, I've found that piling up stuff and shooting over the top is not quite as good because it may tend to draw their attention: doesn't work it he's decided to stare you down at 8 yards (but it's still fun).