A Document Scanner in Your Pocket: CamScanner
CamScanner is an app and cloud service that uses your smartphone's camera as a capable, on-the-go scanner. The software snaps, squares, crops, enhances, and PDFs single- or multi-page documents in seconds. Use the sharing features to post to your favorite cloud storage service (Drive, Dropbox) or send yourself an email with the PDF in tow.
It's a three step process:
First, find a relatively shadow-free, well-lit area in which to shoot your page(s).
Next, verify the automatic page "squaring." The software will automatically enhance the image.
Finally, choose a storage/email option, and you're done.
Take a look at the hastily-scanned example used in this demo.