If you think you've walked far enough away from the road/parking area to avoid other hunters, walk that much further.

when you do kill one, stop and spend 10-15 minutes and pick up EVERY. SINGLE. BIT. OF. EVIDENCE. Pick up the spent shell, pick up the wad if you can find it. Pick up EVERY FEATHER. If there's bare dirt with blood, kick some dust over it to cover the blood. Leave as little evidence as humanly possible.

As others have said, pay close attention to where, and how you park. I will try to lead people where I want them to go by parking in one place and then circling around to a different area. I'll even make sure to leave obvious boot tracks going in the opposite direction for a bit before hopping out of the trail to a spot where I won't leave tracks, then backtrack. .....distract and mislead.