I have 2 dreamers. That's why they do get the second reminder, and then they know it needs to be done otherwise...it is so frustrating to say something a billion times and feel invisible and then end up shouting just to be 'heard'. It was/ is the biggest thing which gets to me, so I know I need to deal with it before we all go a bit mad! I know this does not happen in school, so if they can respond to a teacher (usually the first time), they can respond to me certainly the second time.
We have a reward system for getting ready in the morning without me asking or reminding (my kids are 6,6,9). They have a list on their bedroom of what they need to: get dressed, teeth, pack bag, brush hair, coat, shoes. I give them some grace so if I need to remind once that is ok, but they should be aiming to do it alone. It's not like what they need to do ever changes! The reward is a packet of Match Attax or a magazine, some new felt tips, things like that when they manage this for 6 days. It usually takes a week-10 days or so to get something.
Consequences for various bad behaviours (usually hitting or shouting back at me): no computer, going up to bedroom, no wii, no going on my phone, tidying out the car, going to bed with no story, not having some sweets. It will take time to turn it around.
I would use soup's method to start with, so if she does everything asked before 3x of asking before school, she gets a sticker, and everything asked before 3x of asking in the evening she gets another sticker. You could start with it being that way and active defiance (saying 'No' or 'I won't') can have more of a consequence immediately.