Correcting a child has a very strong component of "choosing your battles." If you try to control every little thing in their life, when they reach teen-age years and start questioning their parents, they will be a lot more likely to rebel against every bit of your authority. If you choose your battles and only correct when really necessary, they will be a lot more likely to see your correction as the loving care that we parents normally mean it to be.
As far as drinking, the body has a tremendous way of letting us know when it needs more fluids - thirst. Let your daughter experience that. Unless you have specific reasons to believe that she is dehydrated or that she could become dehydrated, let her come to you and say "mom I'm thirsty", and then you can provide what she needs. If however, you see signs of dehydration, then you should address it (I have listed those below). Or if you are in an environment where it could be easy to become dehydrated quickly (hot dry day outside, with lots of activity), then you could encourage her to take water regularly to prevent dehydration.
The fact that she is passing urine every two hours should tell you that she is getting plenty liquids, by far. A child at that age can go that much or even three or four hours without using the potty. I would only be concerned and make them drink if they get beyond 3 hours, and even then, I'd be looking at other things - their eyes, their skin, and their energy and activity level.
Signs of Dehydration, from Kidshealth.org
- dry or sticky mouth
- few or no tears when crying
- eyes that look sunken into the head
- soft spot (fontanelle) on top of baby's head that looks
- lack of urine or wet diapers for 6 to 8 hours in an infant (or
only a very small amount of dark yellow urine)
- lack of urine for 12 hours in an older child (or only a very
small amount of dark yellow urine)
- dry, cool skin
- lethargy or irritability
- fatigue or dizziness in an older child