Great instructions posted above. X-Raps are one of my favorite baits, and if you look back at posts, I know I have written detailed posts about how I work it on a few different threads already.
You are going to want to use braid for sure with this bait. You will not get 100% of the action the bait can deliver out of mono. No stretch will give you faster more erratic snaps, and better control and feel for the bait. When you are snapping the rod down you should be able to really hear the "snap" of the line. I usually turn the reel handle one full revolution with each snap. I try to find a cadence that the fish likes. If they are really aggresive, you may want to try 3 full snaps before a pause. If they are lethargic and hitting on more of a deadstick, then you may want to pause after every snap. It usually changes day to day. The most important thing however is the "snap". The X-Rap is a reaction bait, and you want the bait to dart violently from side to side. If you can get that down, you will have success with it just about anywhere.