Awkwardly shove ppl out of your way when walking through crowded streets. Subtly defy authority, eg, put the mask on your forehead and be pedantic about it. Loudly listen to music without earphones in the subway and bus.
The Fable series is pretty good at teaching the differences and how to advance them, I'd start there.
for true evilness do something charitable for the pure laughs
Start every morning by practicing your evil laugh loudly in the bathroom for 20 minutes.
always pay with a cashiers check
