It is advisable to create a password that meet some key criteria:
- its memorable
- its strong
- its not used elsewhere
We would also recommended that you write down the password on paper and store this somewhere not obvious but memorable.
If you have a lot of passwords to remember than a password manager like LastPass or onelogin can work well.
A good article on how-to-geek recommends:
.. choosing four random words and stringing them together to create a passphrase—a password that involves multiple words. The randomness of the word choice and length of the passphrase makes it strong.
The most important thing to remember here is that the words need to be random. For example, “cat in the hat” would be a terrible combination because it’s such a common phrase and the words make sense together. “my beautiful red house” would also be bad because the words make grammatical and logical sense together. But, something like “correct horse battery staple” or “seashell glaring molasses invisible” is random. The words don’t make sense together and aren’t in grammatically correct order, which is good. It should also be much easier to remember than a traditional random password.
Additionly you would split the words with symbols, replace letters with numbers and uppercase for example the 2nd letter so from the quote above you might end up with: cOrrec9%hOrse%bA99ery$s9aple
Reference:
https://www.howtogeek.com/195430/how-to-create-a-strong-password-and-remember-it/