"Besides using supplemental things such as vitalyte/gatorade, what can I do to help my body stay hydrated?"
I'd look more thoroughly into the subject of electrolytes for a start. Maybe consult a sports med physician. I don't know about Vitalyte, but Gatorade doesn't contain adequate electrolytes, IMO/IME. Without adequate electrolytes in your drinks, you run the risk of hyponatremia, potentially fatal, if you drink too much water in an attempt to stay hydrated.