I love simple background images for my computer desktop and one of my favorite websites to go to for them is simpledesktops.com! I was searching on there for a Valentine's Day themed one and stumbled across this super simplistic one that reminded me of all things postal.
Image from: simpledesktops.com
Isn't it great? You can download it to use for your computer desktop here. I know I will be putting this up as my desktop image once Valentine's Day is over!