I usually stay on stand from daylight to dark and I dont think I could do that without a good book.
Someone suggested not staying on stand so long but my way of thinking is I stand a lot better chance of getting a deer if I' m sitting in my stand reading versus being out of my stand because I got bored.
As far as success (knock on wood) I seem to do pretty well. 11 pt. and 8 pt. last year.
Just my 2 cents worth. Have a great day!