If using an RMI, the neddle should be pointing at the wingtip, ie at 90 degrees. (Imagination required for swept wing aircraft). If too close, put the needle just behind the wingtip. If too far away, put the needle ahead of the wingtip. When on the arc, just set a turn at a couple of degrees aob and use the TLAR method to maintain. Easy!
(TLAR = That Looks About Right)