Step by Step Way to The Ultimate Stare!
1) Look at victim
2) While looking at the victim, stare only at one eye. BE SURE TO DO THIS.
If you do it right, you'll see your reflection. "of what?! :O" Your face moron.
3) Now think about how you really want this person to die/etc. Ie: KILLING INTENT.
4) Stare until they look away/get nervous/attack you first.

If it works in the animal kingdom..its gotta work with humans! /half-sarcasm.