Your domain is home. It has to be strong. It has to be findable. It has to be memorable and most of all it MUST say who and what you are. Then you can begin to to work your content management, social media management, your info-graphics management. But never forget, YOU DOMAIN is the focal point, the place, the URL where all of the above and more must connect to.
The starting and finish line, the most important mirror of your presence.
Here’s a few sites that will help you with the peripherals:
(search) Five Apps to Help You Manage Twitter
Always, I do mean always, your domain is, literally, your DOMAIN.