How do I use Evernote with Droid Scan?
Just select your completed scans and use the JPG or PDF share buttons. From the list of apps that appears, choose Evernote, and Evernote will take it from there. These instructions assume you have already installed Evernote for Android on your device.
How can I make sure Evernote performs OCR (optical character recognition) on my scans?
Share them as JPEG images, not as a single PDF file.
Are there additional details I might want to know about?
Yes. See these links for more details.
About OCR in general and how Evernote uses OCR: