Foods with a higher acidity level - peppers, citrus fruits (including juices) and tomatoes... especially tomatoes, all seem to intensify my tics, especially for the first few hours after ingesting them.

Certain sounds - alarm clock beeping, fire engine/police/ambulance sirens, someone scratching dry skin will set off lots of facial and eye tics for me as well as certain vocal beeping

tags on clothes, and the toe line on socks (thankfully lots of clothes now have the label just printed on the clothing)

Being in a place where i know you are supposed to be quite (movie theatres, musuems, church, my univ classes)