Lord of the Rings Marathon

i just got all three lord of the rings movies and i am going to try to have a marathon over the weekend.i have never been able to get through all the movies so now i can! i don't know how long it will take me so i'm thinking that i'm going to take a nap when i get home so i wont run the risk of falling asleep during them.but then again i don't want to get into trouble so maybe that wont happen.