1. Work offline: Google Drive has an “offline” mode that lets you create, view or edit documents in these situations.
2. Search for links from within a document: Just highlight some text, select Insert>Link, and type your search into the link dialog box that appears.
3. Keep track of revision history: to see the revision of a Docs, Sheets, Slides or Drawings file, click File>See revisions history.
4. Use the web clipboard: lets you copy and paste data across Docs, Sheets and Slides, and it can hold multiple items at once.
5. Publish to the web: to publish a document, spreadsheet, presentation, or drawing, open the file and click File>Publish to the web, some file types have some customization options.
For more details on these undiscovered Google Drive tricks with a Chromebook, read the article in PCWorld by Michael Ansaldo.