Give your email account a password you use nowhere else
An attacker can take a password leaked by another website and try it on your email. Once inside, they can reset passwords for other accounts linked to that address. Your email password should therefore be unique.
What it takes
Free. A password manager can remember it for you. The real effort is breaking the habit of reusing one password everywhere.
What you may gain
Trying stolen username-and-password pairs on other services is called credential stuffing. It is an easy attack to automate, and email accounts are targets too. If your email is compromised, accounts that depend on it for password recovery can be compromised in turn. The US Cybersecurity and Infrastructure Security Agency recommends a different strong password for every account, at least 16 characters long, stored in a password manager.
Context & considerations
If remembering passwords is the obstacle, use your browser’s built-in password manager. It is a much better option than using the same password on every site. Avoid storing passwords in WeChat Favorites or an ordinary notes app.
Research & references
US CISA. Use Strong Passwords. https://www.cisa.gov/secure-our-world/use-strong-passwords