Use a unique, strong password and a password manager for every account

Unique, strong passwords managed through a genuine password manager address one of the most fundamental account security practices, directly countering the specific, well-documented risk of credential stuffing — attackers using passwords leaked from unrelated breaches to attempt access across many other services, which succeeds precisely when the same password gets reused across multiple accounts.

Password managers solve a genuine, practical human problem that password policy alone cannot — remembering genuinely unique, complex passwords across dozens of different accounts is realistically impossible without some form of assistance, and without this tool, people naturally gravitate toward reused or simplified passwords despite understanding the security risk this creates.

The genuine security improvement here compounds across every account using this practice — a compromised password from any single breached service provides an attacker with credentials only valid for that specific service, rather than a master key potentially unlocking every other account where the same password might otherwise have been reused.

This practice deserves genuine, comprehensive application across every account, not selectively applied only to accounts perceived as most important — since credential stuffing attacks specifically exploit password reuse regardless of which particular account the reused password originated from, comprehensive unique-password practice provides the actual protection this approach is meant to offer.