Though I intend to answer further, this question struck me best.

3. If your submissive side of your personality is different than your "everyday" self, how do you reconcile the two? How do you switch back and forth? What is your trigger for getting into "sub mode?"

I am in my "everyday" activies outspoken, bold, loud and harshly cynical. When someone gets to know me better, they can uncover a little of my softer side. I am mostly passionate and compassionate. And I am by far not always pleasant. As a submissive, I often can be kind of a brat until, as you put it, I am triggered. I am not trying to tease anyone into dominance, or punishment. I am just being who I rather normally am. With my significant other, it is almost always a look that will flip my switch. Or sometimes a small act of pain.
Otherwise, I sort of just fall into it. It does not have to be anything sexual/romantic/relationship related. If I am around a person who I either feel dominated (not neccesarily as in our definition of the word) by or inferior to, I will often fall in step /behind them/... wait for them to speak and generally be quiet as a mouse and very obedient. I think this is my latent submissive showing through.