How to create a password purely in your head?

We all know the reason why to make passwords complex and long enough. It's easy with a help with computer program, but can you suggest simple methods to do this without resorting to computers?

Passphrase Approach

Start with a long, personal phrase like "I love hiking in the Alps during summer2025." Shorten it by taking first letters or words: "IlhitADs2025." This yields 12+ characters that are easy to recall from the story behind it.​

Substitution Tweaks

Replace common letters with lookalikes: "I" to "!", "o" to "0", "s" to "$", turning "IlhitADs2025" into "1lh!tAD$2025." Add site-specific tweaks, like "AMZ" for Amazon: "1lh!tAD$2025AMZ." These resist cracking while staying intuitive.​

Tips for Strength

Aim for 15+ characters mixing cases, numbers, and symbols. Use unique phrases per site, avoiding dictionary words. Pair with a password manager like Bitwarden for storage, recalling only the base phrase.