To the common passwords listed above, add about 50 more numbers for me to remember:
-All my combination padlocks belonging to me or family (especially my parents).
-Serial numbers and company phone numbers for various safes belonging to me or family.
-Passwords/phone codes for home security systems belonging to me or family.
-Wifi networks belonging to me, friends, or family
-Social security numbers and passport numbers of family members (especially my daughter)
-Credit card numbers for buying stuff online. (I often don't carry around my credit cards, but I always have my smart phone.)
-Frequent flyer numbers (high security is unnecessary, but still...)
-Member numbers of my professional licenses (high security is unnecessary, but still...)
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In my family, I'm the guy to call if they forgot how to access whatever it is they're trying to access. Over several years, I'd say I've received about 30 such calls. I can't just use a notepad. In my case, the notepad method would be boldly irresponsible.
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If you're reading this, it's too late.