If there's a muscle, I've had a cramp in it. At the end of the day, my legs can cramp so bad that even putting my full weight into a stretch isn't enough to release the spasm. Often the muscles in my feet cramp to the point that my toes cross over each other, and some bend back and others forward. I'll get cramps in my ribs, back, neck, even face.
Things that help me: drink enough water, take magnesium supplements, use a heating pad, and stretch regularly throughout the day.
I also get the random twitches. Some twitches are the eye lid twitch kind (quick, rhythmic, tiny movements). Others are like the muscles are trying to do the "wave" (slow, longer lasting, and moving up and down a large muscle). This wave kind I get if I've overdone it that day.