As others have said, showers are very quick, utilitarian things. Get wet, turn water off, soap up, turn water on and rinse. That's it. I save the long, luxurious showers for home or a really nice bathhouse. I also don't shower every day. I wash up with a sink of warm water and a soapy wash cloth most of the time.
I have a big round bowl that I use for a dishpan. An inch of hot water, a squeeze of soap, and I start washing. As the bowl is filled with washed dishes, I turn the water on just a trickle and rinse the soap off into the bowl. After the dishes are done, that bowl of soapy water gets dumped down the toiled into the black tank. I do dishes once a day.
When you wash hands or brush your teeth, turn the water off while you suds up. Think of it like the navy style shower -- get wet, water off, suds up, turn water on and rinse.
