Being a stoner is almost like being a surgeon. There are so many instruments needed. And the way we tend to focus and use both our hands when rolling a joint to ensure that the joint comes out properly makes us look like a surgeon performing surgery. Seriously all that is lacking is a pair of latex gloves, a surgical mask, and a scrub cap.
Speaking of which, I strongly suggest the use of surgical mask and scrub cap when rolling a joint. The surgical mask is to prevent you from accidentally blowing away the finely ground cannabis and the scrub cap is to prevent hair to fall into it (they tend to happen once in a while).
With that said, if you are in the market for some instruments, check out the following list.