I love Photoshop, but it can be a total time sink for me!

The interesting thing is that D and I both use Photoshop quite extensively: me for processing photos and producing graphics, him for testing experimental print heads, and we use it quite differently and use quite different features. So every now and then I'll do something and he'll go "How on earth did you do that?" and I'll be amazed that someone who uses Photoshop as much as he does doesn't know that. And vice versa, I gather.