Interpreting freaky dreams is fun and entertaining. I have a friend who goes weekly to a Jungian analysis to find out what her dreams mean. You can do that, or buy a book. When you buy a book, the analysis tends to be universal. For example if you dream of biting into an apple, a book, if it's written by a Western author, might bring up ye olde Adam and Eve story. If you have never read the bible, that might not even apply to you. Its better to interpret your own dreams based on your own self.
Dreams occur naturally for most people. Dreams take place in your REM period of sleep. REM sleep research is interesting. If you live near a university you might even be able to get paid to sleep! When I was a kid I lived near the University of Chicago, they would advertise in the local neighborhood paper for study participants. Sometimes I got paid, sometimes I went for fun. Sleep labs employ some real quirky students.
About that time I honed the talent of lucid dreaming. This is a state when the dreamer is aware she is dreaming. As soon as you know it's a dream you can fly or swim or jump to the moon, anything you ever wanted to do. If you are a small person you can be tall, if you are a fat person you can be thin. Lucid dreaming is more entertaining than a 3-D movie. Try looking at your own hand during a lucid dream, it will bring more power to you.
Anxiety dreams: Trying to get through to someone on the phone, and you just can't. Either the number is wrong or the connection is bad. You can't hear them or they can't hear you. Sometimes the key pad melts to your touch. You don't have to be Freud to figure it's something you want to say to someone. The question is who? Co-worker? Spouse? When you wake up see who comes to mind. When you wake up, instead of trying to remember the whole dream keep a notepad by your bed and write down a few key words like "phone" and "connection" to help you flesh out the whole storyline.
Shame dreams: Being profoundly embarrassed, like you show up at church naked, is never fun. And yet, it's one of the more common dreams. It's a long walk home. Shame dreams can dredge up profound emotions of low self esteem. If you don't feel good about yourself, or a situation you are in, you may have one of these dreams.
Dying. I once dreamed I was pushed off a cliff. I contracted so hard I woke myself up. Contrary to popular belief a dream of dying is not bad. It's a dream representing change. A new stage in life. A new project.