Use the "passwords" feature to check if one of yours is compromised. If it shows up, never ever reuse those credentials. They'll be baked into thousands of botnets etc. and be forevermore part of automated break-in attempts until one randomly succeeds.
Don't forget unique email addresses. I've had two spam emails in the last 6 months, I could trace them to exactly which company I gave that email address to (one data breach, one I'm pretty sure was the company selling my data). I can block those addresses and move on with my life.
My old email address from before I started doing this still receives 10+ spam emails a day.