Evernote is a suite of software and services designed for notetaking and archiving. A "note" can be a piece of formatted text, a full webpage or webpage excerpt, a photograph, a voice memo, or a handwritten "ink" note. Notes can also have file attachments. Notes can be sorted into folders, then tagged, annotated, edited, given comments, searched and exported as part of a notebook. Evernote supports a number of operating system platforms (including Microsoft Windows, Mac OS X, Chrome OS, Android, iOS and WebOS), and also offers online synchronization and backup services. (definition from Wikipedia)
Evernote lets you keep notes, ideas, snapshots and recordings in one place across devices. Instantly synchronizes from your iPhone to your Mac or Windows desktop. Key features of Evernote:
This is a review of the Evernote app, not a tutorial, but I think it gives a good overview of what the app does and is worth taking a look at.
First in a series of 7 tutorials on Evernote. View the video on YouTube to access the rest of the videos.