Here is a page from my spell book. As I am doing the Pagan Blog Project with just spells this year I decided to make a new spell book with just spells.
I find this one very useful.
If you can’t read my writing :) It says
Boundary, Boundary, Boundary, Bright
in the dark and in the light
Nothing passes through this line
unless they be friends of mine
You can build this mentally or you can also make the line out of salt.