"This is what the kids and I came up with, I know its simple, but it works for them."

**Starting at one corner of the bed, draw a line from that corner to the others. while you are doing this, say:
North, South, East,West,
I draw this gate to keep all nightmares far from here.
**You say this as you are touching the four corners of the bed; you can use this to guard against anything that you wish to keep away.