There must be absolute silence. My family knows that when I crack open a book, everyone must shut up the hell up unless they want to experience my wrath.
When I'm home alone I usually read on the couch. If everyone else is home, I read in bed. That way there is a door between me and the noise.
I always, always read before I go to sleep. Even if it's just a few pages.
I don't usually eat/drink when I'm reading because I become so absorbed in a book that I forget about my tea and by the time I remember, it's gone cold.