Mongo sometimes gets asked , “how did you do that?” but can hardly remember particularly when there are many steps in altering an image in PS.

Can anyone tell Mongo how he can keep or more importantly, print a history of all the actions/steps taken in photoshop in respect of changing an image. Presently, my history is set to about the last 30 steps (but can be increased). However , the real question is how that history can be printed out.
Help would be much appreciated.