On deck?
It varies. I listen to audiobooks during my commute to work, and it's hard to predict when they will finish. For those, I keep two or three on the player in addition to the one I'm listening to. For others, I have a shelf of "to be read" books at home, so when I finish one I go over to the shelf and see what tickles my fancy at the moment. I've also got a bunch of unread books on the Kindle, and for those I mostly read them in the order I bought them although I try to switch genres a bit from book to book.
I usually have 5 or 6 books "On Deck" and when I see my stack dwindling to just a couple, I am out at all the usual haunts where I buy used books. Sometimes if it's something I really want to read I will go to Barnes and Noble and actually buy new ones!! lol
I've had a life-long bad habit of buying more books than I have time to read right now, so my pile of books I intend to read "this afternoon" is pretty high and extends all throughout the house. "So many books; so little time."
Not as likely to be distracted though when reading naked: because I'd have to put clothes on before I can go to the grocery store!