1. You know the world is about to end, you know when, how, why, and how to stop it - but nobody believes you. What do you do?
If I know how to stop it, that would include how to convince others to believe/help me (if it is necessary for me to need the help of others). So, ya.. I'd stop it. P=
2. You have figured out that your entire life is a sham, that it's all been fake Truman Show style, but nobody will admit it to you - what do you do?
Honestly..? *twiddles thumbs*
I would not mind very much..
Job or not, the people I've been around for my whole life are bound to have formed some genuine attachments to me, and I to them - just as coworkers develop friendships. But I would be eternally embarrassed at the thought of having been stripped of all my privacy and exposed for all my life.
3. One day you wake up and nobody remembers who you are. You are a complete stranger to everyone you know and love. What do you do?
I'd try to win back those I wish to keep with me in my new life. I would know enough about them, and how to subtly establish a connection, that it wouldn't be an issue. Then, slowly, in due time, I would break the news to them that they knew me in the past..
4. You're in a time warp, the same day happening over and over again. What do you do?
Assuming I keep my memory of the previous repetition each morning, I would use this to my advantage and find out everything about that day's arrangement as possible. Then once I have a god-like understanding of the causality of that day, around the world, I would proceed to try and take it over in a single day! (for the lulz)
Then I'd probably get very depressed - being unable to connect with anyone on a deep level (because well, the most I can invest in a connection is one day before it all resets again, so ya..) - and die of loneliness.