Andrew Langley takes edhat [pics] and edits them with photoshop techniques. I take photos (screenshots) off Edhat and process them in Photoshop Elements or take them further into various and sundry plug-ins to add textures and effects I wouldn't dream up on my own very quickly. Sometimes I come up with interesting presets to use on future images of mine but for the most part the files just get deleted when I'm done. Hours can go by as I delve deeper and deeper into the creative juices that often only leads to a sense of well being and satisfaction but nothing tangible to show for it. Is that level of non productivity something to feel guilty about? A waste of time? I think not.
Photoshop doodles, this would help you to tame your craft. or at least point it in the right direction, learning shortcuts and generally messing around with what you like.