I use shavings all through the hutch and hay in the bed, they also like to eat hay.
They sometimes like something to chew on like sticks, its good for their teeth, but i wouldn't recomend just any sticks, i'd buy them from the pet shop as i am not sure if any are poisenous to them.
Fresh food and water every day, and cleaning out regularly, and thats it, its easy really!
Is it a baby rabbit?
They do like to have a companion, although mine hasn't as i didn't know this and hes 4 now and i just think he would fight if i suddenly introduced another rabbit or guinea pig!