I stop consuming caffeine 2 days before a holiday and preemptively take acetaminophen for a day to prevent any headaches. Then no caffeine on the holiday. I sleep more, relax more and just generally more chilled. I sometimes try to stay off it a bit after the holiday but that rarely lasts long.
Just a question -- are you entirely sure your acetaminophen pill doesn't also contain caffeine?
Just since that's an extremely common combination, and I wasn't aware of acetaminophen on its own being able to counter the effects of a caffeine-withdrawal headache.
Because a caffeine headache is neither a migraine nor a tension headache.
And according to Wikipedia, paracetamol is mainly only useful for migraines. For tension headaches, you need the combination with caffeine and aspirin as well.
Caffeine constricts blood vessels, which is why it's useful against headaches. And why withdrawal causes headaches, because now you have more blood flowing than you've been used to.