How do you charge your MacBook / iPhone / iPad ?

I love my MacBook retina and I want to use it as long as possible.

When I bought it, I knew I won't be able to switch the battery.

I read it's bad if you always charge them fully up, and it's bad let the battery go down to 1 percent too.

I always charge my battery from 40% to 80 %. Once a month from 1 to 100%.

Hoping this is the best for a long battery life.

How do you charge? Do you care about this? Should I do this to my iPhone / iPad too?

I'm sorry if there a some mistakes in the text, english is not my native language.