ORIGINAL: toprudder
What I do is to flip the idle-up switch on once the rotors have spun up. This will keep the head speed up and let the blades go a little more negative pitch when you are transitioning from forward flight back to a hover. Just remember that if you do crash, you need to turn this switch off and pull back the throttle stick.
The idle up curve is set up so that once you are past center stick the speeds will match. You should flip to idle up once you are in hover. If your radio is tuned properly you should notice little difference in head speed when you flip the switch. It is ok to flip it on the ground, but your stick should already be at mid point. That way your motor won't get a sudden surge of juice. You can actually snap the main gear if you flip it too early.