If you have weak nails and always wear nail polish, give your nails a rest and allow them time to breathe for a couple of days without polish – if you don’t they’ll just stay weak and probably turn a nasty shade of yellow.
If you file your nails between manicures, avoid filing the corners of your nails too much as this can weaken them.
Keep your nail polish in the fridge for when you need to touch up your color (this will keep it at its best).
Re-apply a top coat after a week or so of having your nail manicure to prolong the polish.
Regularly moisturise your hands and cuticles to prevent them become dry and flaky.