Figuring out your triggers is key. It could be uneven sleeping patterns, lack of exercise, or certain chemicals in foods you may not have thought of (try googling "migraine trigger foods" for good lists).

In addition to the above, I get triggered by bright sun and car exhaust, so I wear shades and try to avoid traffic or trucks.

I have never found any OTC medicine that helped. Avoid any meds with caffeine, as they can cause rebound headaches.

If you get nausea, ginger ale/tea/candy can be a great help.

I take Riboflavin and Magnesium supplements, as those have been proven to help with migraines. Also, Omega-3 and Feverfew. Again, though, these are all doctor prescribes and monitored, which is key.

Hopefully some of these ideas help you get a good start. I used to be bed ridden with severe chronic migraines and had to make a LOT of lifestyle changes (like the above -- nearly all the possible trigger foods are triggers for me) but the changes have made life enjoyable again.