Drink water, everyone.
But I believe if your family members had kidney stones then its only a matter of time until you do too, regardless of your diet.
Yeah some people are genetically predisposed to getting them, so they'll more than likely have them regardless of their diet or water intake.
Also there's two different types of stones, those caused by calcium phosphate and those caused by calcium oxalate. Oxalate stones are caused by things like cranberries, grapes, spinach, and strawberries. So even if you think your diet is good you could still be causing yourself to develop kidney stones.