Migraines

In 2016 The Cochrane Database of Systematic Reviews published a review of 22 trials and a total of 4985 patients which showed that acupuncture may reduce the frequency of migraine headaches and may be as effective as preventative drugs. [Source]
In 2017 JAMA Internal Medicine published a study in which 245 participants were either assigned to a control group, sham acupuncture group or treated with a total of 20 acupuncture sessions (5 days per week for 4 weeks). Results showed that acupuncture was more effective in reducing long-term migraine recurrence when compared to sham acupuncture or no acupuncture. [Source]
In 2002 Headache published a study of 160 women comparing acupuncture to flunarizine (migraine preventive drug) for the prevention of migraines without aura. Acupuncture was more effective within the first four months, with no difference seen between the two treatments at 6 months. Only acupuncture reduced pain intensity. Side effects were also significantly less in the acupuncture group. [Source]
In 2011 Cephalaliga published a study in which 66 patients with chronic migraine received either 24 acupuncture sessions or the migraine preventative drug topiramate over a 12-week period. The results showed a significantly larger decease in headache days in the acupuncture group and a significantly lower rate of negative side effects (6 percent compared to 66 percent in the topiramate group). [Source]

CoQ10

In 2002 Cephalalgia published a study which tested the effects of 150 mg/day of CoQ10 on 32 patients with a history of migraine headaches. The result was a 55 percent decrease in migraine frequency after a three month supplementation period. [Source]
In 2005 Neurology published a double-blind study involving 42 patients which found that CoQ10 was more effective than a placebo in controlling migraine headaches and was well tolerated. [Source]

In 2005 European Journal of Neurology published a 12-week study in which 18 subjects who suffered from migraines or tension headaches increased water intake by 1 liter per day. The total hours of headache in a 2-week period was reduced by 21 hours and accompanied by a reduction in headache intensity. [Source]
In 2015 the Journal of Evaluation in Clinical Practice published a study involving 74 headache patients which found that increasing water intake improved migraine-specific quality of life in patients with chronic migraines, with 47 percent of the intervention group reporting greater than a 6 point improvement on a 10-point scale, compared to 25 percent in a control group. Drinking water did not reduce number of headache days. [Source]