Text icons tutorial help

Hey, I've been looking around and I can't seem to find any tutorials which are just about icons with just text on them. [I.E. no picture of someone or something. But yes stuff like textures, brushes, etc.]

Example of what I mean are ~
 created by Trixy from PandorasCloset

I don't of course want a tutorial of those particular icons, but if anybody knows of any good texticon tutorials, I would be very grateful! ^.^
Thanks anyway!