“If you don’t want to entertain, fine — but you should know how to be a good guest,” says Amy Sedaris, star of the quirky homemaking show “At Home With Amy Sedaris” on truTV. For her, that means not bringing a bouquet of baby’s breath hastily grabbed from the bodega. “It’s my worst nightmare because I have to take the flowers, acknowledge them, open them, cut them down, find a vase, then find a place for the vase … it’s just a lot of work. And half the time it’s just an afterthought; the person just didn’t really think about it.” — Eric Hegedüs