Fool proof way to grow long & strong nails that stay healthy?

Well my nails would never grow but you know I started to take good care of them without spending much. I only bought the miracle grow polish I think thats the name not sure. You can find it in WalMart or Target and just put it on every day and trim the ends of your nails but let them grow though just trim the ends so that they get a good nice shape and you'll see how in one week they will grow a lot. That's what I do and always have nice nails. Buy the clear polish. Hope this helped.