Here's some grooming tips I'm going to give you, Satan:
If you really don't want to be found out? Avoid the Evil Spock Goatee, and try not to style your hair so that it looks like devil's horns.
See how easy that is???
Next up: Lessons on how to avoid giving yourself away in your speech patterns.
Although, if you're being played by Al Pacino, you can still get away with YELLING random WORDS at the top of your LUNGS, since people pretty much expect that from every Al Pacino character now, ever since he became he white man's Samuel L. Jackson.