What is a website everyone should know about?

https://lemm.ee/post/1008147

What is a website everyone should know about? - lemm.ee

haveibeenpwned.com

To figure out if your email addresses are part of a known breach. Also, start using a password manager (bitwarden.com)

Have I Been Pwned: Check if your email address has been exposed in a data breach

Have I Been Pwned allows you to check whether your email address has been exposed in a data breach.

Have I Been Pwned
A good alternative to Bitwarden is KeePass/KeepassXC btw
A good alternative to keepass is a self hosted vaultwarden btw. (compiled from bitwardens opensource code iirc)
Nothing can beat passwords written on paper though
Physical access can. Indentations on the below page can. Fire and moisture can. Someone looking over your shoulder can.