Yes! I'm afraid of heights and here's what I did to overcome that:
1. Don't look down (better to just close your eyes)
2. Hold someone's hands (if no one around, just hold your own hand; you can fool yourself into false security)
3. MOST IMPORTANT: Try to avoid high places (if you can't avoid high places, say because you work on the 5th floor; then refer to steps 1 and 2)
The fear of heights can also cause dizziness. Avoid food. And remember to breathe. I'd say avoid liquor but that may actually help you (results may vary).