Here's a really quick pro tip for Photoshop and Photoshop Elements, related to the Ctrl/Cmd key and the Move tool.
Your Ctrl key, or Cmd key on the Mac, lets you switch temporarily to the Move tool from another tool to accomplish something that only the Move tool can do. So let's say you're over here on Layer 0, with your Rectangular Marquee tool selected. You select one of these letters:
and copy something out, which places that selected bit it on its own layer, and your cursor (still in Rectangular Marquee) loses its target of Layer 0 and goes up on to the next layer.
To quickly get back to layer 1, you have three choices:
1. Move your cursor all the way over to the Layers palette and click on Layer 0 there,
2. Type V to actually select the move tool, and then click on Layer 0, and then type M to get back to your Marquee tool,
3. Hold down your Ctrl/Cmd key while you click on something IN Layer 1 right there on your document. Your cursor temporarily turns into the Move tool to show you what you're doing, and there you are on Layer 1 again, ready to select something else or move along to another task.
I pick 3. It looks like this:
With my Ctrl/Cmd key held down, I can click on any of the letters in the alphabet set and be taken back to that layer. Presumably to cut another bit out, but at this point, the sky is the limit. :)