Is there an easy way to quit nail biting?

Yes, there are easy ways to stop nail biting, and they are usually the most direct one. More than easy I would say simple. Here's a great article on easy ways to stop nail biting.

It discusses various tips that you can use today to start battling this bad habit. Bad habits are not easy to erase, and event he most simple alternatives like putting nail biting creams can do nothing if you don't put the focus on your goals and stick to the treatment.

It's a patience game I would say. Patience is what helped me overcome this habit and can help you too if you stick to the tips in the article. Good luck!