Originally Posted by
noglider
Walk the wheel back in the dropouts. Tighten the right axle nut and loosen the left. Pull the wheel back. Then tighten the left and loosen the right. Pull the wheel back and tighten the right axle nut. Is it set right? If not, then reverse the procedure.
Usually it doesn't take more than on iteration for me. If the axle is walking forward when tightening, I'd check the dropout alignment and the contact surfaces of the dropout. Something's not even top-to-bottom. I'd also take the nuts off completely and clean and lube the threads.