You can run no-huddle but not be in a hurry up. That is where some people get messed up in the game, they think they have to hurry up and pick a play when they no huddle. I run no huddle occasionally, usually when I have a play in mind that I want to run next. You can run complimentary plays in progression if you want. Such as running off tackle the first play, then read option the second play, then hb counter the third play. Just go with what you feel like running. It also helps to have many formations with the same personnel. So you can change formations and run/pass options just by changing the wr's alignment. Just develop what kind of identity you want your team to have and get personnel to fit that system. Such as power running inside, speed backs/hybrid receivers, or good pass catching/route running receivers.