Sandi from cutepolish gives these 5 tips to help us stop biting our nails. As a nail biter myself, I know how habitual this problem is and how embarrassing it can be to try to solve it. Nobody wants ugly nails! With these tips, I can even have my nails look good in the process! 

From personal experience, I've found the 'distractions' tip to be the most effective method. This is coming from someone who has been "on"/"off" nail-biting a lot. Creating the habit of not-biting will just take time!