ADDING NEW ITEMS
As an intranet contributor, you have the ability to add items to most sections:

From any home page
Scroll to the bottom of the opened Web part and click the Add new... link, as shown at the right:

From the Full View of any section
To access the Full View screen, click on the title bar link of the Web part.  Click on the Add Item link at the top of the screen, as shown below:

When the New Item screen appears, fill in the appropriate fields. 

Click on Save and Close to complete the process and return to the previous screen.