The end of November is a good time to check your online security status. This is no more paranoid than locking your car doors when in a big city.
First have you been compromised? Check your emails on monitor.firefox.com . They aren't trying to fear-sell products as some of the functionally similar sites.
- Change passwords on any compromised accounts NOW.
- Don't reuse passwords.
- Do use a good password manager.
On password managers: I prefer offline password managers like KeePass, but a reputable online password management service is better than recycled or easy to break passwords. I prefer offline because online password management services seem like a great negative opportunity for a data breach.
Reduce your "attack surface". That is:
- Uninstall software you don't use.
- Close accounts for services you don't use.
- Unsubscribe from the junk emailers.
- Have a separate email account to use for junk/spam/...any place likely to sell your data to others.