A couple of says ago there was an excellent comment here on Hacker News about that you shouldn't read only in bed but allocate proper not tired time for reading. Otherwise you learn to associate reading with sleeping and drowse off after a few pages.

FWIW, I’m mildly dyslexic and likely read slower than most. This year I’ve made it a goal to un-do many of the coping strategies I’d developed over the years to keep pace, and instead really focus on stopping and looking up phonetics for words I couldn’t easily sight (kindle is clutch here). On the plus, it also means I’ve had to become rather deliberate about what I read and when I read it — HN, newspapers, and Reddit all took back seat this year (and I couldn't be happier).