There are lots of keyboard shortcuts in Photoshop, but these are the easiest (and most useful!) They will save you a lot of time browsing through menus etc.
- Pressing D on your keyboard will reset your colour palette colours to black and white
- Pressing Ctrl (and hold it down) whilst you hold F will repeat the last command you just did
- Pressing Ctrl and N will open up a blank image
- To undo your last action, press Ctrl and Z
- To open a file quickly, press Ctrl and O
- To deselect an image, press Ctrl and D
- To zoom in, press Ctrl and +
- To zoom out, press Ctrl and –
- For help with Photoshop, press the F1 button