What can I learn in 10 minutes that will be useful for the rest of my life?
Have a ‘clutter collecting’ email id.
Do not use it to send emails. Never give it to anyone you want to actually correspond with but use it for purposes such as (i) Verification for free wifi in public places (ii) Getting discount cards in shops (iii) Hotel check-in forms (iv) Websites which ask for email ids. for accessing them (v) Any other place where you feel that your email id. is not really required.
Your real email account would stop getting advertisements or spam emails or, at least, these would decrease. Chances of getting hacked get decreased, too.