Weak, cracked, or stained fingernails? You’ve come to the right place. Our friends at PureWow have four tips to keeping those nails strong and healthy. To see all four simple tricks for healing damaged nails, click here. More from RealSimple.com: 6 Great Nail-Care Products Choosing the Best Nail Polish At-Home Manicure Must-Haves Filed under: Where We're Clicking