Being able to assume the best shooting position is a critical skill rarely mastered. It means knowing which position is steadiest for any situation. Sometimes a standing, offhand shot is the correct one. Lying prone only to discover the rolling ground covers your target is a waste of time. So, first train in all the standard positions: prone, sitting, kneeling, standing. Then train with your preferred shooting support (bipod, monopod, sling.) Then teach yourself situational awareness. As you hunt, observe terrain and vegetation, and how those influence suitable shooting positions. Hunting is a thinking person's game. Planning ahead puts you at the top of that game.