You'll be more limited in the shots you can take behind you, especially if you cant the bow, due to one or the other limb contacting tree or stand, so you'll want to know what you can and can't do.
Also, it's important to practice at elevation. Shooting instinctively on the ground, your brain will learn to compensate for the trajectory of your arrow. That trajectory changes radically when you're shooting down from a tree. If you don't practice from elevation you'll most certainly shoot high.
If I can't shoot out of a stand I go up on my garage roof or in my kids tree fort. Have even shot out of an upstairs window.
Trad gear really shines in close range ground situations. I shot a doe at 3 yards once while I was sitting flat on the ground against a big oak tree and it was one of the most thrilling moments I've had. But there are times when hunting on the ground isn't the best choice (swirling winds, uncertainty of animal's direction of approach, etc.)
Doug