Personally I would recomend you get a "Boo" String wiht the cat whiskers

Very impressive results. and I agree on the STS. The Rite Stuff kit comes with pretty much everything you need. A sling is also a nice addition. If you are going to make up your own kit you have lots of options. What is a nessecity to one person is an option for another, so how and where you hunt will be a consideration in additional equipment. The stringer is a great thing to keep in your pack along with a spare string just incase. I agree to build up a habit of hitting the safety right after it is cocked to reduce dry fires. It is too easy in a rush to forget.
Wyvern
P.S. By the way, thanks guys