i use about 2 feet or more of sewing thread(thin/fine)....just start by tying an overhand knot and start wraping the thread around the string...after about 15 times around i measure again with a bow squareto make sure its in the correct spot(continue wraping back and forth over itself to make it about the size of asmall brass nock....

i wax the bowstring heavy in the spot before i start and wax over thenock real good half way throu, and when im done...it wont move...and if you feel like moving it after you shoot a bit you can peel the end up and unwrap move and rewrap.....

ive always used this method and it doesnt move on me...all i have to do is keep wax on it(i use the natural wax(red cap)...i like it better than the synthetic(green cap)....if u want dab avery small amout of cement on it after your done and your sure you have it in the right spot..

brass works too but if you have some thread use it...its easy, doesnt cost anything if you have some already, just make sure you measure with a Bow square...more than once because ive started and finished and then measured and realized it wasnt where i wanted because i wrapped the threadto much on the wrong sideof where i started....so i had to unravel most of the way and then rewrapand rewax.