A healthy diet that includes minerals and proteins can make nails more beautiful, while making them less breakable, too. A diet weak in nutritional value leads, not only to dull hair and a lack of physical energy, but also weak, brittle and almost transparent nails. Adding more of the recommended daily allowance of vitamins and varieties of foods strengthens bones, teeth and nails.
Caring for fingernails from the outside also helps prevent breakage. Moisturizing the cuticles and massaging oils or vitamin creams into nail beds and the nails themselves actually can strengthen nails by preventing drying. Keeping cuticles pushed back and filing nail tips in one direction, versus back and forth, also prevents nail splitting and weakening that can lead to breakage.
Taking a break from some bad habits and adding some good ones in the way of nutrition and moisture can help give nails a break, while keeping them from breaking.