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Graduate and know how to do it before they do
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Be able to cook your own food and wash your own clothes before they can
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Do something useful with your time while they waste it
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Do better to please your parents
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Tape them to the bed while they sleep
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Play tricks that you know they'll fall for
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Establish your greater range of knowledge
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Use your more useful knowledge to beneficial effect
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Give them sarcastic advice
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Let them fend for themselves in times of need
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Be an actual role model
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Do what you enjoy in the hope that they'll be forced into doing it
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Become better at everything possible
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Be a role model for them and show them how to become more crazy and insane
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Beat them at every competition you can both be in