1) If you can afford it, the only plow for a truck is a v-plow
2) Mushy, 32-34 degree+ plowing will suck no matter what you do. You can literally get out and hand shovel and you will still pull up grass and make a mess. You either let it get cold, or you do the deed and have a bag of grass seed for spring, and a rake/planner with your tractor.
3) Fast/slow whatever. Keep in mind you need momentum, and if the snow is heavy, going slow the first past is gonna leave you stuck with a huge pile you can't move. So blast through, then go slow on clean up.
4)Brakes are cool, snow banks work as well, but if you want the truck to last, use the brakes. Also coming to a stop before switching R/F over and over and over helps the tranny last.
#5/bonus) Get your butt out there now and pick up anything that might be in the way/ on the ground and cause you issues later! Those little things that don't seem like a big deal, turn into one when they freeze to the ground.
Good luck!