spin tool, constantly messing up with it

Hello, as the tile says, i always mess up with the spin tool. Can someone explain or link me to a good tutorial for it?

http://cgcookie.com/blender/2012/01/11/blender-feature-using-the-spin-tool/

Another option is to use the Array Modifier with a rotated Empty as an Object Offset. This assumes you are spinning the entire mesh, but it has the advantage of giving you the option to only Apply at the end, if at all. When you do Apply you will probably want to check Merge, by the way.

-rking