1. Using an ill tasting polish:
The best way to actually break the habit of biting your nails is by applying a clear polish like Malava Nail Biting Polish. This has a really nasty taste that every time you want to bite your nails you will realize the taste and will eventually give up. Even subconsciously you would not want to bite your nails after using this ointment. Unfortunately this at times back fires and can be just a temporary way of how to stop biting your fingernails. Once you stop using the polish and even if once you bite your nails you will be back on the habit again.
This recently has become a new trend. You can buy a number of Hypnotic Mp3s and put them on your Mp3 player or Ipod and listen to it once at night before going to bed and once in the morning. The problem with this method is that it works on some people and on others it doesn't. In the end how will this help you find a way on how to stop biting your fingernails?
I don't think I need to go far with this one. I mean how to stop biting your fingernails with this advice? All you will do is getting some tips in a book saying do this and that but does it work? Well it all depends - some books actually have some tips that use psychological concepts.