Whenever I find software or an app that makes my life easier, I like to share it. My current favorite is Scanner+ Pro by Capable Bits.
Compatible with iPhone, iPad, and iPod touch, this app can automatically detect borders and scan a document as a black and white, grey scale, or color image and then save it as a PDF. It then allows you to send the document via email and print it. I have mine automatically upload to my Dropbox, but you can also manually upload to Dropbox, Evernote or Google Drive.
I believe this app was originally $4.99, but right now it’s FREE. (The app store says this free offer is for a limited time, but who knows what that means.)
This app isn’t meant to be used for high quality scans, but the results are still crisp and clear. And if you ever need to sign something and send it back without the hassle of a fax machine, it really does a nice job and and is super easy.