I burn Bay Leaves and inhale the smoke through my nose.
Bay Leaves enhance Clairvoyance and were once used by The Oracle at Delphi to promote visions. She would chew them, I would try that but I haven't had a Bay-Leaf Plant for awhile so I only use dried Bay Leaves. I doubt chewing them dried would be as powerful but burning them and inhaling the scent works wonderfully.
Don't believe the rumors that say the herbs must be fresh, they work wonderfully dried too, you just have to find a way to use them!