This is a spell I've had sitting around for some time, it takes a bit of focus and creativity but I've been using it for years so I thought I should share it.
In order for this spell to work you have to visualize a barrier protecting your mind and thoughts that if anyone tries to get through it will put them in a maze that always leads away from your mind.
When you are able to visualize this simply chant the following
Protection on my thoughts and in my dreams
from those who would interupt my resting streams
May they be lost till they go back
among these walls of ivory black
Now what I've found makes this spell work so well is that it's strength is tied to a mix of your creativity and your ability as a caster. The more complicated you visualize the maze the harder it will be for someone to get through, but then again the more power is needed to maintain it.
Any comments or discussion on this spell is most welcome.