As made evident by the variety of replies, it depends. I have tried it many different ways. I now keep a short length of rope tied off to each end of the front crossbar with a carabiner to quickly attach to the trapeze wires to stabilize the mast side to side. I also use a spare jib block and cleat mounted on my trailers mast cradle to hoist my mast from 45 deg to vertical and hold it in place while I secure the forstay.
When I am with an experienced person on a not gusty day I just lift the mast up from the tramp and hold it until my crew can secure the forstay.
When I am alone I use everything to get it up.
Try a bunch of different things, pick the one you like best. The only thing I would not recommend is lowering the mast without the stepper pin/craftsman screwdriver. Did that once, actually didn't end too poorly, but it could have.
One last piece of advice. Try lowering your mast with your jib furled around the forstay. Once the mast is down, take off your forstay/jib and gently coil it. This trick is nice for older jibs that have temperamental zippers.