Make yourself a practice station on the range. Always put shafts or other clubs on the ground to check that your stance line is square to your target line. Jim Flick, who coaches Tom Lehman and Jack Nicklaus, likes to have players put the alignment shaft along their heels, not their toes, because if you like to flare out one foot, it will not alter your alignment.
Then place another shaft perpendicular to your target line to indicate your ball position. Finally, put a shaft in the ground to the side of your body on the same angle as your clubshaft at address.