To add a new Contact hover your mouse over the Manage button in the header menu.
A drop down list will appear.
By selecting the option "Contacts", a new page will open up with a list of all your Company's Contacts.
On the top right hand side of the screen you will see a green button which says "Add new Contact".
Fill in the relevant information under each heading.
To add this Contact select the "Add this Contact" button.