What is the correct way to charge an iPhone, to extend battery life and keep battery health hight?

I've been wondering for a while now whats the correct way to charge an iPhone, without damaging the battery's health and avoiding overheatment.

I use a QI-Certified Wireless Charging base and the standard included charger.

Wich are some tips and recomendations you could give me and the community on charging correctly and iPhone (and other devices)?

- Andy