One of the advantages of having a camera on your iPhone and iPad is that you can you use it with great apps like Scanner Pro that let you take photos of documents to "scan" them and store as PDFs. The result looks just as if you used a physical scanner to do the job.
To use Scanner Pro, you simply take a photo of the document you wish to scan, or upload a photo that you took at an early time from your Camera Roll. After you take the photo, Scanner Pro will automatically detect the edges and put a box around it. If it needs adjusting, you can simply drag the edges and corners to where they should be. In my experience, the detection has been very good. Even when I intentionally did a terrible job at taking the photo, Scanner Pro found a way to make it work.
Scannner Pro also allows you to choose the document size before accepting the scan. Choosing an accurate paper size and border for your page is important for having the best looking scanned document for your result.
Tapping Done will bring you into the next stage of the scanning process. This is where you can decide if the document will be in color, black and white, or simply look just like the photo. You can also adjust the brightness and contrast to make sure the final documents looks good. Tapping Done at this stage will finish the scan.
After you've scanned your documents, you can share them to Dropbox, Evernote, or GoogleDocs. Scanner Pro also includes the "Open in" button so that you can open you scanned documents in any other apps that support PDFs.
Scanner Pro does a great job at scanning documents into electronic form. It's a perfect solution for people who don't have access to scanner or for those time they're away from their scanner. I'm beginning to think I didn't need to purchase that all-in-one printer I bought last month.