Everyday I find several new ways to market and promote books. So many that sometimes my head spins. It spins in a good way but spins none the less. Social networking is so exciting and unlimited in terms of what you can do and who you can reach. I must say it is time consuming and it does take a bit of time to build up speed but once you do it takes on a life of its own. And it is exciting!
Put in the time. You won't be sorry. If you are able, get someone to help you. A publicist already has a good list of sites and will know how to get things done quickly, giving you the time to keep writing.