Twitter works extremely well to get increased traffic to your author's den account and to your own web site if you have one.
I got over 2,900 hits when I first started at another site and increased them here at Author's den without even trying. People google me and got this site.
Here's what you do: Set up a twitter account; follow as many people as possible. I followed other authors and publishing houses, got 1,000 followers in two weeks. My twitter name is .lnnie.
I tweet about three times a day mostly on the craft of writing and public affairs. (You can see them if you look me up on Twitter.)
Now I have about 300 more regular readers A DAY on another site.
I will now concentrate on this site and see what happens.
Sold some books too!