Bonus Tip #1: Straigtening Crooked Photos
What if your original picture looks great except that it's crooked? Easy. On the lefthand toolbox, choose the Straighten tool. (See Photo 1)
Click the top left corner of your card and drag to the top right corner. (See Photo 2.)
Let go and your photo will magically rotate so that the card is level. (See Photo 3.)
FYI: Do this before you crop!