Aries: biting the ends of pens/pencils
Taurus: cracking knuckles
Gemini: procrastinating
Cancer: picking the skin off their lips
Leo: therapy shopping
Virgo: biting nails
Libra: watching reality tv
Scorpio: swearing in professional areas
Sagittarius: speaking with their mouths full
Capricorn: sleeping late
Aquarius: road rage
Pisces: talking to themselves