Take a nap can help! For the "worst headache in the world" see someone right away as that could be a serious problem. And lots of headaches or really bad ones need some evaluation. Otherwise here are some suggestions: allowing yourself to close your eyes in a quiet space can help; a botanical called feverfew has a role for migraines although evidence is less now;acupuncture;neck traction or massage;manual medicine/omt.
Alternate. Alternates include acupuncture, biofeedback, botox.