I have really been a slacker on my internet promotion stuff recently, but I did finally remember to add a booksigning to my BookTour page.
If you're not familiar with BookTour, it's a nifty tool for both readers and writers. You can search for a favorite author, and see if there is a signing in your area. You can sign up for email updates within a certain distance, and get email notice of authors who are coming to your area.
I put a BookTour widget on my website Appearances page, and the Appearances button here at the blog goes to the website, so I only have to put the date once at BookTour, and it goes everywhere.
As long as, you know, I remember to do it once.