Conor and Pilar frequently reference 1Password’s White Paper, which explains the security architecture and overall security philosophy of the company.
Pilar mentioned the well known XKCD comic on password strength that popularized the comical phrase “correct horse battery staple”.
1Password’s Watchtower has many useful features related to monitoring the security of your account passwords and your use of two factor authentication (2FA).
You can learn more about Troy Hunt’s Pwned Passwords APIhere and here. Also, check out Junade Ali’s post on the Cloudflare blog about why and how he proposed the Pwned Passwords API should use k-anonymity.