Deosil simply put is clockwise or sun wise. So when you are moving in the circle Deosil you are moving clockwise. Deosil is used for constructive magick. When you cast a circle you do so Deosil. Pretty easy to remember and that is in a nut shell what Deosil is.
Widdershins simply put is counter clockwise or earth wise. So when you are moving in a circle Widdershins you are moving counter clockwise. Widdershins is used for destructive magick. Often when you are banishing a circle you will do it Widdershins. Also pretty easy to remember, but living in Indianapolis as I do we have a couple of really big auto races here. The one most people know is the Indianapolis 500. So as little pagan humor and to help people remember what Widdershins is I came up with this saying many years ago. 200 laps in a circle Widdershins and they wonder why they hit the wall.
Reference: master-of-pentagram.blogspot.com
