One thing that helps quite a bit for me, but detracts from the scale like manner of many warbirds, is to increase the height of the tail ( wheel ).

The idea is to level the plane a bit more so that it tracks somewhat similiarly during the transition to the point that the tail wheel lifts off.

Then adjust the tail wheel to make the plane track very SLIGHTLY to the right when pushed forward with all of the controls centered.

The more level angle coupled with the tail tracking will offset the yaw until the rudder becomes effective.

I've done this at the field for people who have problems at takeoff, much to their surprize it helps quite a bit.

You can also mix in a little rudder with the throttle when the gear is down.