Use the NULS system:
Make at least one character in your password be a NUMBER. Also be sure to use at least one UPPER-CASE LETTER, as well as at least one LOWER-CASE LETTER. Sprinkle in at least one SYMBOL: these can be found by shifting your number keys on your keyboard, or by pressing the special character selector on your tablet or phone. You can combine words from your favorite songs, initials that have meaning for you, with dates or numbers you can remember.
For each account you maintain use a different password. Why? Because if hackers figure out one, they may use it across the board, and access all your accounts.
Yes, this is a lot of work, but consider it a recipe for success and privacy.
Change your passwords regularly, like at least once a year.
And remember to use double verification systems that notify you by alternative means that your account is being accessed.