My favorite password generator is http://preshing.com/20110811/xkcd-password-generator/. The four word password it generates is easy (or at least possible) to remember. When you can’t remember it, you can look it up and remember it long enough to type it into the computer.
There seem to be arguments about how secure they are but I suspect that’s just emotional. ‘If I can remember it, it must be easy to guess’ To get an idea of how difficult it can be, wander around https://map.what3words.com/remote.sums.palms for a while!
Xkcd suggests 4 words, but I personally feel safe with three. Again, see the above link.