People who live in hot, dry climates and those who exercise frequently may need to drink even more water to produce enough urine.
* Eat fewer oxalate
. If you tend to form calcium oxalate stones
, your doctor may recommend restricting foods rich in oxalates. These include rhubarb, beets, okra, spinach, Swiss chard, sweet potatoes, tea, chocolate and soy products.
* Choose a diet low in salt and animal protein.