The more I read, the more I bite my nails! When I’m busy with projects (organizing, sewing, managing finances), it’s not a problem. When I read, old habits (since childhood) sneak in. If my nails are in good shape, they’re more likely to stay that way. If there’s a nail that needs some cleanup, it’s likely to get torn or chewed before I’m consciously aware of it. :-(
Still, I’m doing WAY better than I have been. My best tip is liberal use of Band-Aids: if there’s a nail that’s short and uneven, wrapping it in a Band-Aid keeps me from picking at it when my brain is otherwise engaged.