In contacts there is a full CRM - Customer Relationship Management Database where you can track all your information about your customers. (Read More Here) 

   To add a new contact just go to MY -> Contacts and click New Contact in the top right corner and insert all necessary details

   That allows in ''Create a Load'' to just type first letters of the company name, and all other information gets auto-populated (Address, Phone Number, Fax, Email).