Ticcing and what to do about it

I'm struggling with ticcing in public. My particular tics are occasional facial grimaces, and hand flapping, but the worst (which is the most recent) is a head-tilt to the right and placing my face almost onto my shoulder. The peoblem is that it makes people stare, and I know I've done it at work before. The hand flapping I can explain away by gesturing a lot, but the head-tilt I can only half-convincingly explain as a 'twitch'.

The head-tilting is getting worse, but I need to know how to deal with it before it gets to be a real hindrance. Any suggestions? If I've had a stressful day and have conciously hed it back, it gets harder to control after I'm alone and in my own rooms (where no-one could care less what I do).