Until the bitter end...of the chapter?

Ok, I admit it...I'm one of those people who has to read to the end of the chapter when its time to put it down. My OCD won't have it any other way. Also, my food can't touch when its on the plate but that's a whole other story. Did I mention I'm ADD as well? LOL ANYHOW...I have got to read to the end of the chapter I am on...so I've formulated my reading time around the chapter lengths. (Yes, I've already told you I'm OCD.) Say its 9pm, I'm wide awake and I want to read. I have no problem picking it up and reading it because I know I'll be able to get at least a few chapters in before getting sleepy. Now. If its the same scenario but I'm already tired, I'll check to see how long the chapters are and decide from there if I'll read or not...because I can't not finish a chapter. 
Now none of this applies if I am so far gone into a book that I will line up the K-kups for the long haul and totally regret it in the morning. Alas, my party days are over and the only hangovers I get are the movies (OMG did you see Hangover 3??  Turrrible...) or a book hangover...which I like a lot better. 
So, what's your story? Do you have to complete a chapter? Will you plan your reading time around the chapters if you do?  Or am I just cray cray and all alone out here?