Thanks a lot, yea I wasn't sure what to do with that, cropping always seems a little tricky for me between getting aspect ratios right for prints and then making sure the crop is still good for visual interest.
I've started adding borders to my non-standard crops for printing. See this example:
The border aligns to a 4x6 print. After printing, I can cut off the excess border if I want to. I've also started doing this for shots when I cropped it so small that it won't print well at 4x6 (shh, don't tell anyone)