Hunger

Does anybody have any tips for good snacks during pregnancy? I'm 11 weeks and still experiencing morning sickness (aka all day sickness), so I am trying not to eat too heavily, but I'm finding myself getting extremely hungry during the day and it comes on very suddenly.  If I don't eat, I get nauseous very quickly.  I am having trouble finding foods to fill me up and not make me sick! Any tips would be appreciated!