You can access your bookmarks either on the "My Data" page or the dashboard page.  

Option 1: On the My Data Page

Bookmarks are associated with a specific dashboard.  On the My Data page, you can click on the bookmark icon right bottom side of the dashboard button where you saved the bookmark. Click on the bookmark and you'll jump right to it.

Option 2: On a Dashboard Page

1. First, make sure you are on the dashboard where you saved the bookmark. Bookmarks are associated with a specific dashboard. In this example, the bookmark is on the attendance dashboard. 
2. Then click on the arrow next to the word "Bookmarks" under the large dashboard name in the top of the left sidebar.
3. Finally, click on your bookmark.