1. Make some homemade deodorant. I have tried so many store bought natural deodorants ranging from at the grocery store to uber-expensive Etsy purchases. This simple recipe works better than anything I've tried. It's also inexpensive and simple to make. I even brought this on our trip to Puerto Rico. It really works!
2. Stop buying paper towels and napkins. We use kitchen washcloths to do counters and a quick wipe of the floor, towels for drying hands and dishes, and a stack of baby washcloths for hands and faces and tiny messes. We keep a bucket under the sink to collect the rinsed out used cloths and wash them every couple days.
3. Buy a reusable menstrual cup. There's a learning curve to these, but it is more than worth it. You save tons of plastic and bleached paper waste. It's cleaner (seriously, it is) and saves you tons of money. This is the best for traveling. All you need is a tiny bag and a pack of pantiliners.
4. Use a foaming soap dispenser and large refill bottles of hand soap. Refills for foaming dispensers are pretty much all water! Buy the concentrated stuff, add about 3/4 inch of soap. Fill the rest of the bottle with water leaving about an inch of space at the top. Replace the foaming push top, shake it a bit and reuse. You'll go through refills much more slowly without sacrificing cleanliness.
5. Skip the sunscreen and wear a hat and long sleeves when you can. Grab a lightweight long sleeve shirt that you can wear comfortably on a hot day and a wide brimmed hat that covers your neck and face.
6. Drink water instead of soda, juice, sports drinks or enhanced water. Plain water that you filter at home or drink from the tap. Bring a water bottle with you when you're out. You're saving money as well as saving all those shipping costs of bringing cans and bottles and boxes of mostly water across the country.