This is a good move to start off with if you are new to contact. Do a hand wrap (roll it over the back of your hand) then bring your hand in towrds you and let the staff roll over your elbow. Leave it fairly late in the hand wrap to begin bringing your hand in.
I like this move because people don't normally expect you to go back up the same arm you came down. As the staff is on your neck let it do an extra spin on your back and lean to your left and back so it comes round in front of you. Then lean to the right so it throat wraps back to your left shoulder and hold your arm out and swing it backwards so the staff rolls back up your arm.
Diabolo trick: Wrapped Acceleration
For a full description and more tricks for diabolos check http://www.diabolotricks.co.uk/trick/wrapped-acceleration.html