My main focus has been on reducing plastic use, similar ideas to the other replies: reusable containers, cloth bags, no packaged food, bamboo brushes etc. Some other things I've tried, I now use a Castile dish soap and some vinegar mixes I store in bottles I had at home. I've also tried shampoo and conditioner bars, it takes a couple of washes for your hair to get used to them. If not, there are also companies where you can send the shampoo bottles back and they refill them for you.