Here's a picture that I want to edit before adding to a layout.
Here's the picture once I ran an action. It would be a pain to drag it all down to the layout and I don't always want to flatten it, especially if I'd like to come back and adjust something. It's just easier than undoing things. To create the composite layer, press Ctr/Cmd +alt/opt + shift + E (a nice workout for your fingers!).
Ta-da! A new layer with the edited image. All you need to do is highlight the layer and drag it down to your layout. I had no idea this existed and I was too excited once I found out how it works! I hope this helps make your editing and scrapping a little easier.