If I haven't shot for a while, I usually gape in horror at the first target I shoot, and then watch the increasingly tighter groups as I slowly get back to where I should be. I divide my practice between the kneeling and offhand positions. Kneeling, I believe, is the most useful of all the positions. It's not as steady as sitting, but is faster to get into, pretty stable, and it gets you up above the weeds and the brambles so you can see your target. Offhand is the toughest position by a mile, and distressingly often, a hunt hinges on your being able to shoot from it.