Before i disengage my wheelbrake and pull collective, I trim with a little forward cyclic. To practice getting the right amount I would leave the wheelbrake on, and trim forward, then pull collective, and if done right... the nosewheel will lift off just before the main gear... Dont know if this is correct, just how i do it.
BTW, i use an X52
EDIT. Oh, and darnit Tusler, now I have to change my pic!! lol