Many headaches are from the neck. If you regularly do neck stretching that helps. Plus, run the shower hard to the back of the neck. Turn gently from side to side to see who is behind you. This gets rid of the built up lactic acid.
Posture. Computer screen glare? Slumped in chair watching TV? Is your reading prescription right for you?
Premenstrual headaches? Try no salt 10 days before period, plus dark chocolate. Or a mild diuretic.
Headaches from Sinus? Try humming,"ooommm" to get the cilia moving. Or use the Hydro Pulse Nasal Sinus irrigator to restore good cila movent.