Are the free days really worth it? I only have 1 book up there and have heard so many mixed reviews as to whether it is worthwhile or not.
Amazon could do a lot more to tell authors about who's buying their books. Their tools don't tell me whether a sale came from a link on my Twitter, on the aforementioned website, or from Facebook, or wherever, so I have no clue what the best places to promote my book are.
The people whom I hear are doing well all have several books in the Kindle store, so maybe that's part of the secret.