Hmmm... I don't know that I would know where to start. Using PhotoShop is easy once you know a couple of tricks. Making an invite is just a matter of finding out what details you want, and placing them nicely. As far as my invites, I do it a little bit different - I look at magazines, comic books, etc. online and I get an idea, then I mess around in PhotoShop until it looks similar to what I saw. On the back, I try to put all the "who what where when and how" stuff that is typical for a party invite. Hope that helps - I know it isn't exactly what you were looking for, but aside from searching Photoshop tutorial on google, followed by something specific you want to do - I don't know that there is one. I would start with finding something, figure out what it might be called and search for that. Then move to the next piece.