1.UFO's.
I believe that people have been unable to identify flying objects :-) I will say that any scientific objections about aliens traveling here are nullified by the concept of worldships or generation ships.
2. Ancient Astronauts/Alien kidnappings
I don't believe in ancient astronauts and I don't think it's likely that aliens would bother to keep kidnapping people. The psychological explanation for why people claim to have been abducted, though, interests me.
3.E.S.P. and Psychic powers
I don't believe in what are typically referred to as psychic powers, but science is continuing to discover interesting new senses in our bodies that seem almost magical; for instance, nerve 0: "a tiny, relatively unstudied nerve sprouting from the base of the brain whose function is only now becoming clear: subliminal sexual attraction. Many scientists believe that pheromones, those silent chemical messages exchanged by members of the opposite sex in search of mates, relay subconscious signals to the brain through this obscure nerve." (From this article.)
4. Conspiracy theories
I generally don't believe in these. There are certainly people in power who want to subtly manipulate us, but they all have conflicting agendas, so it's not as if all the world's leaders can actually agree on some direction for humanity like a "new world order". And, as pointed out already, national conspiracies such as a moon landing hoax would require too many people to keep a secret.
5.Angels
Nope.
6.Revelations by God
Nope.
7.Any other belief
Nothing major. Some are too personal (identifying) to list here. I do tend to believe that humans are meant to play some special role in the universe, or perhaps just that life as a whole is proceeding according to some plan, but it's just a hunch and I'm not dogmatic about it, nor does it necessarily affect how I make decisions in my personal life.