To add links in the left sidebar of your Site...

1. From the Admin Site Map, click Left Sidebar Links (under Content).
2. From the Left Sidebar Links page, click the Add Link button.
3. To add a URL link, select URL for the Link Type.
4. Type in the Link Name (how you want the name of the link to appear in the Sidebar).  Note: try to keep it to 15 characters or less.
5. Paste the URL into Link URL.
6. Either make a selection in Assign To Existing Section Name, or type a new section name to the right of the Section Name selection box.
7. Click the Add button, and you are done.
8. Note you can add links to Site Pages and Entry Forms by changing your Link Type selection when you add a link.  You can also choose to make links only visible to Admins using the Visible in Pubic Site checkbox.