polish on your nails because it makes your nail harder, and therefore, they will not break as easily. the polish works asa shield. -don't use your nails to text, open things or anything else. This task weakens the nail. -this is an obvious one: don't bite your nails! it defeats the purpose of nail growing. [sorry but i don't know how to stop you from biting your nails. i never had that problem] - nails need moisture just like the rest of you does, to stay hydrated. so when you ...