Water filters are a great start. Personally, I avoid any plastic food and drink containers. Canned food too, since it has BPA filled liner inside of it. Glass is our friend. Growing your own food is helpful too. And avoids the estrogenic pesticides and herbicides.

None of this has to be absolute. You can just avoid plastic as much as you can, and, over time, replace your plastic products with glass and metal. Food storage, utensils, cookware, etc...