Do you have any bad habits?
I bite my nails when I'm anxious, nervous, or extremely focused. It sounds weird to bite your nails when you're focused, I know... but I usually do it when I'm hard at work on a project. It's strange but it works for me.
People know not to come to my desk when I'm biting my nails. Haha! I hate being bothered when I'm trying to finish projects by a deadline.
I bite my nails when I'm anxious, nervous, or extremely focused. It sounds weird to bite your nails when you're focused, I know... but I usually do it when I'm hard at work on a project. It's strange but it works for me.