5 things I can do with my Kindle that you can't with your dead-tree books.

1. Read things I save for later using Instapaper.

2. Sync highlights and comments to Evernote.

3. Search for a quotation or section in a book.

4. Look up a word in the built-in dictionary or a concept at Wikipedia.

5. Use the built-in 3G to navigate Google Maps via the browser.