When I practice chipping around the green I pick a spot and hit four balls at it from three different distances with an 8 iron, trying to land the ball on that spot. Then I do the same thing, except I try to hole the balls (although I think aiming for a spot is better practice because greens vary from course to course). Then I do it again with my sand wedge. Those are pretty much my two clubs around the green because given the amount of time I have to devote to the game (which is little lately), it makes more sense to know those two clubs intimately, than to have only a passing relationship with four.