I don't have the chicken expertise that some people do, but I have a philosophy that has worked with cats, children, cockatiels, and, thus far, chickens.
1. Don't over-complicate things. If you set up a difficult system that relies on frequent, intensive input you will eventually get worn out and/or suffer an emergency that prevents you from providing that input and the entire system will crash. At work I am sometimes praised for my efficiency, but what I really am is lazy.
2. Don't fix what isn't broken. It happens more with child-raising than chickens in my experience so far, but there is always a fad for having some kind of trendy problem that sets people seeking elaborate solutions to problems that are 90% imaginary (in my own childhood it was seafood allergies, my 4 kids born over a span of 14 years went through Milk is Evil!, Wheat is Evil!, Soy is Evil!, and Gluten is Evil!).
3. You can't go wrong with fresh air and exercise.
4. A little dirt is healthy. Not filth, of course, but no animal, not even human animals, was intended by nature to be raised in a sterile environment -- much less an environment saturated with the fumes from strong cleaning chemicals.
5. This one is specific to the chickens, but I figure that chickens know better how to be chickens than I know how to be a chicken so I give them options. My in-town run was partially open, partially covered, and hardened against predators. Therefore I left the pop door open except in emergencies and the chickens got to choose what kind of weather they wanted to go out in and where they wanted to sleep.
I let them dig their own dust baths where they want them. The current chickens have 3 -- one under their ramp (probably the coolest area in the pen), one in a very dry area, and one where there is a lot of old pinestraw so that there is more organic matter in the soil.
I free-feed (layers, not meaties), and offer both pure water and water with electrolytes (once a week in this hot weather).
It can certainly be overwhelming to have people telling you a bunch of things that chickens HAVE TO have -- many mutually exclusive. But both chickens and people are adapatable and you'll come up with a philosophy that works for you.
