5. The Act
You've got the place, you've got the name, you've got the wardrobe and the weapon. What's missing? What's needed to start bringing it all together? You need to move correctly. Make sure you have the right stance.
The important thing is to look confident. Look as if you meant to do whatever it is you meant to do. Did you just drop a cup? Improvise. You didn't drop that cup! You threw it down! Why did you throw it down? You're angry, obviously. Pick someone at random and berate them for some fault, real or imagined. Fumbled a pen when trying to write? Nonsense. You've just decided that you have more important things to do than write your own letters. Get someone else to do it for you. Tripped over your own feet? That's the fault of whoever put in the flagstones, or failed to sweep up properly. You are not to blame. It is not your fault. Even when it is.
Onto the stance. Most of the time, a good upright bearing is essential. Don't slouch if you can help it, unless you're capable of affecting a kind of laid-back, urbane charm. Draw yourself up to your full height. If your minions are taller than you are, require them to kneel in your presence, or simply hire dwarves, goblins or circus midgets. You think Papa Lazarou is that big in real life? Of course not! It's all down to Simba, Pebble and Tikk-Tikk.
If you can't stand up straight, hunch over. Many great villains are deformed, and history will remember Richard III as a villainous hunchback no matter what he did. Take your deformity as an excuse to be abusive. Carry a walking stick and jab people with it. Snarl up at the world.
As far as acting goes, you have two main styles to look at: loud and quiet. Although the reality is a little bit more complex, loud villains rant, while quiet villains are sinister. Being sinister is all very well if your heroes have heard of you and know you're not one to mess with, but if they don't know you from Adam then you need to be larger than life when you're in their presence.