This should be an easy first step toward a more sane and sustainable way of life: Stop using bottled drinking water and convert to tap water. Here are a bunch of good reasons in an infographic. These numbers are staggering.
Ten reasons to drink tap water and avoid bottled water
I’d rather drink pure, natural spring water bubbling up from deep within the Earth and recycle the plastic it may be stored in (as opposed to drinking municipal tap water, which is simply filtered sewer/toilet water filled with chlorine, fluoride, pharmaceuticals, possibly e-coli, and other nasty unhealthy impurities.