Water
It's so important to make sure you are getting plenty of water and good quality water. I encourage you to drink at least half your body weight in ounces of water each day. If you are physically active, you should increase this. Look into using a water glass, or stainless steele water glass rather than bottled water.
Also, it's super important to have clean water, not just for drinking but think about your cooking and laundry and what you are bathing in. There are a number of great whole house filtration systems. You can also look into filters for your shower heads too!!