The Kindle Daily Deal is just that -- a deal. If your book is regularly priced at 99 cents, then they will not choose it because they discount up to 90% off, and the lowest price they will discount to is 99 cents. A 99 cent book on sale for 99 cents isn't exactly a "deal."
Other than that, a lot of luck. And sacrificial goats. And sending back the "I accept the terms" email when they invite you to participate.
Other than that, a lot of luck. And sacrificial goats. And sending back the "I accept the terms" email when they invite you to participate.