Get with your fly half and practice your timing and communication. Also work on really being vocal and taking charge of you pack, the are your real work force.
Have a solid pass, go on YouTube and watch Aaron Smith of the all blacks. He is a legend and a great scrum half
Perfect your passing technique to deliver the ball to your left and right, both to your forwards and backs. You always want to hit the chest for your backs and a bit lower for your forwards when they go head-in to a clash (long passes, short passes, unders balls) then you've got your kicking game for those up-and-overs and for touch. And a thing great half-backs have is VISION!! When to pass, when to scoot the ball from the ruck/maul/scrum because they've spotted a hole in the defense, when to kick etc. good luck and all the best :)
Yes. Deliver the ball rapidly to the backs or kick for touch. Opposing forwards enjoy flattening indecisive scrum halves.