hi! I also have tourettes and was diagnosed in 2011. what works best for me is distracting myself the best I can, drinking some hot tea, going in a quiet space with no people (if possible), closing my eyes, and breathing. another thing that helps, especially with my wrist twisting tic is trying to do the opposite motion to confuse my body. does that make sense? in your case, if you want to move your neck one way very violently, try to gently/slowly stretch it the other way without harming yourself. avoid caffeine if possible because it makes you jittery and makes them worse. put your favorite show on, tuck yourself into blankets so you feel more limited on movement. massage your neck, use heating pads, cuddle with an animal or stuffed toy. please let me know if any of these help you!! <3