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Wanted to chip in – I followed the advice here but instead of giving up coffee I switched to decaf and switched back to the active stuff as needed. Can confirm that it definitely works – I can summon up a good, driven day at will!
Also in the news today, coffee prolongs your life – win win! http://www.today.com/health/coffee-can-be-part-healthy-lifestyle-new-studies-show-t113669