I took one of those driveway/sidewalk edging tools and made a few lines 10 yards apart on one side of my shed. They need to be gone over every once in a while, but it was quick and easy.

On the other side I don't have anything (practice for judging distance).

In fact, my buddy just bought a new McKenzie 3-D target and I made some 2x4 stand legs for it. The "Big Buck" target comes with 2 pieces of rebar to drive into the ground and then the legs of the deer have hollow pipes to recieve the rebar.

By driving the rebar into pilot holes drilled into the 2x4's the target is now "portable". One of us gets up in the practice stand, and the other moves the deer into position, walks back under the stand and says "There's your shot". Works great - you can position the decoy at different angles, yardages, cover (using tree braches as obstruction) - definitely more realistic than shooting broadside at what you know is 20 yards.

I think we have as much fun trying to make the other guy miss as we have shooting.