What are common headache triggers?

See below: Many factors can cause or contribute to headache. Triggers include foods, chemicals, bright lights, lack of sleep, stress, sinus problems, crying, excess noise, and hormone fluctuations. Pinpointing headache triggers can greatly help in treatment and prophylaxis.
The list goes on. There are certain foods and aspects of lifestyle that can trigger or worsen headaches and migraines. The best way to identify triggers is to maintain a headache diary and keep a list of foods eaten before your migraine. Common triggers include chocolate, caffeine, cheese, msg, processed meats, alcohol, smoking/being around smoke, stress, skipping meals, lack of sleep or too much sleep.