Dreams where you astrally project yourself into another plane or dimension. Sometimes they are just for fun, other times you are there for a purpose. Prophetic dreams where you see events of a possible future. If the dreams involve yourself, you are capable of changing that future if you so desire. If it involves others that are not close to you, you will have a hell of a time convincing them to wrestle with what they believe to be fate.
Prophetic dreams can also be dreams of past events or future circumstances.
If you have a problem for which you can find no conscious solution, you can program your mind before you sleep to work out the difficulty and present you with the best alternative. Likewise, if someone is keeping information from you for whatever reason that you feel you must know, dreamscaping can bring you that knowledge. Finally, if you consciously know you are dreaming while you are in that dream, you can control that scene, making it go where you want it to. Tarot cards and runes are excellent devices for dream work. Silver has personally found the runes excellent door-openers to the unconscious during dreamtime.