Sometimes your dream sign can be something that can have many shapes. For example water can be as taking shower, river, lake, ocean, washing dishes and so on. Or Buildings can be as your house, store, school, work, etc.
It's interesting to find dream signs in our dreams for fun, or to use them as RC point. But they are not really necessary. Since even if we do have dream signs, they most likely don't show up in every dream. That's why it's best to do a reality check at random times.
Most important thing is your state of mind when you RC, not really what you are RCing on.
So at random times, whenever you remember to RC, stop what you doing and be amazed and surprized when you ask yourself "am I dreaming?" Believe that you could be dreaming. Look around, try to recall how you got there, do few of your RCs then set your intent to RC realize that you are dreaming next time you are dreaming.
You can ofcourse also RC on your dreamsigns. If your DS is your friend, RC everytime you see her in waking life. Or you can even RC on any person and tell yourself "this is my friend" and again set your intent to RC and realize you are dreaming next time you see her.
More here:
http://www.dreamviews.com/dild/13212...ods-dilds.html
http://www.dreamviews.com/induction-...hecks-rcs.html
Moved to Dream Signs and Recall