I have been having migranes with aura since i was 13, im 19 now, iv been using tablets called migranate, available without perscription(here in ireland anyway)
There are 2 tablets, pink ones and yellow ones! The yellow ones(or is it the pink ones?!) Are taken as soon as you feel a migrane may be coming on, So like as soon as the aura begins, and,for me, when i do take the tablet at the 1st sign of a migrane, and lie in a dark room within say an hour at the aura is gone and the migrane headache didnt even get a chance to start.
Quite a few things can cause migranes like food allergies, for me its too much choclate...
Pity...cause i love choclate!

Also...beyondthevalley...what exactly does 'vaporizing marijuana', Like what do you do? I assume its different to actually smoking the stuff?! Just curious....