Well I am not expert enough to tell you much but will share a few obvious things.
Make your brush blind type stands roomy enough that you can look around and stand up without hitting the sides and spooking the animal. Also, build in some concealment from the rear as these guys will sneak in behind you more often than you might guess. Use a comfortable seat, because you sit still for much longer when you are comfy. Be especially concious of wind direction.
Move SLOWLY.Be QUIET, remembering to clear the leaves and debris from around your feet. Camo is anything that allows you to blend into your particular surroundings. Commercial camo or muted plaids are both very effective, as are ghillie suits. I'm sure you already know all this, but it is good reinforcement to repeat the basics from time to time.
I have been doing more ground hunting in recent times, myself. We all know pretty much what to do, but noise and sight discipline are just that much more important when on the ground.
You will also have opportnunities to see a lot of wildlife close up. Squirrels, possums, and birds will often wander into your ground blind. On one chilly evening a black snake actually crawled into my lap, presumably for warmth (no danger here, I had seen this particular snake several times in the area and was familiar with it). Once I had a youg doe with traces of spots still showing stick her head in the blind. She was too much of a baby to want to shoot her. All of this is to show that in addition to being a very effective means to hunt, it is also very entertaining. By the way, laughing out loud at some of these sights is not good sound discipile.
You will love it. Good luck with the recovery after your surgery. Desire to return to the sport is just as important as the physical training in your overall progress. Work quickly but don't rush it beyond medical advice.