Promoting your work is as time consuming if not more than the actual writing of the book or books.
I try to write at least an hour and a half every week day and plan on starting to write on the weekend because I want to increase my output. After I finish my writing for the day, I do promotional related stuff for about two to two and a half hours every day, more on the weekends.
I enjoy doing promotion for the most part. I like meeting new people through blogs, Facebook, loops, Goodreads but I wish there were more hours in the day so I could do both promotion and writing in equal amounts.