Launch the Google Docs app and tap on the "Create new" icon.
Select "Document from photo" to start up the OCR camera function.
Line up the document using the camera on your Android phone and take the photo, then tap "Done." If you don't get the results you want, make sure your phone's camera is set on Auto mode and try forcing the flash.
Choose the file name for upload and select the Google account you want to upload the photo to, then click "Done."
During the upload, Google Docs will convert the photo. Once you open the document, you'll see the text it was able to convert.
Remember that the OCR feature works best on unformatted text--no handwriting or designer fonts--and only in English. Google promises that the feature will work better over time, so keep the app updated for improvements!