Yea Smiley21 is right on, dreams are basically a visual manifestation of our world, some have meaning, others are just what they are. There are a lot of books about dream interpretation and websites, but the best way is to keep a dream journal right by your bed, and when you wake up- write down everything right away. you can always "analyze" it later...
Freud said that dreams are the "royal road to the unconscious" ....
also, that is very common for you to dream about whatever is on tv, that external stimuli is being interpreted by your brain through your dreams. (thats why tv is disrupting for a lot of people before bed)
No, you will not die if you fall and hit the ground in your dreams, that is just an urban legend or whatever. Usually, you do not hit the ground in your dreams, i'm not sure why though. You know when you are JUST about to fall asleep and your whole body shakes and you feel like your falling but its just from like one step? That is your nervous system preparing for sleep. I could go into the technical analysis, but I'll spare you in the mean time.
Water can be interpreted a variety of ways, I tend to think of it as a symbol of fluidity, (water can take 3 forms, and obviously moves lol) can be a symbol of life, movement... it all depends on the context of the rest of the dream really and what is going on with you.
PM me if you want any more info....
I would recommend keeping a dream journal for a few weeks and see what you come up with
(I got my degree in psychology if you're wondering lol)