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.
I’ve started using {emailaddress}+{sitename}@gmail.com i.e. myemail+xyzCompany@gmail.com
That way I can at least see who sold my info. I wish I would have started doing this long ago though. Some sites dont let you use the plus symbol even though it’s valid though
This trick is common enough and trivial to reverse engineer. I can just purge my billion-email-address hacked list of all characters between a + and an @ and have a clean list that untraceable with your system.