Take a ScreenShot of your skills every once in a while. It's for backup in case you get roll backed, lose your skills, and wish to get them back.

Kthxbai.

///Edit by Extreme///

This goes for rare items and mithril pieces, etc as well.
Do not try to edit your inventory in paint or photoshop or whatever.
I can see through that and you will be auto banned if you attempt it.