n.dave. I aim for a point on the runway..usually one of the centrelines. If you are having trouble lining up just move your head to the left so that aiming point is lined up with the centre of the windscreen. Obviously only works on pretty much no wind days but it is great for the practice. Once lined up put your head back to the normal position and note the spot on the windscreen and keep your aiming point there.
Remember you rudder too, keep her in balance..sometimes people just don't use the rudder when converting over to the right side.