Also, when harvesting wood from tall trees it's worth not dealing the final blow, as otherwise opponents can spot the trees disappearing from a distance and start paying attention to your activities.
Finding open doors is a surefire way to know that another player has already passed through an area, and may still be nearby, so make sure you close any entrances behind you to not give away your position. If you're planning on camping in an area, it can also help to destroy any nearby structures built before hiding so enemies arriving afterwards aren't on alert. Also, when harvesting wood from tall trees it's worth not dealing the final blow, as otherwise opponents can spot the trees disappearing from a distance and start paying attention to your activities.