I think the best way to go is to stay off of all soda pop.  Then go with some coffee for your breakfast drink.  We like freshly milled
whole bean coffee, Caribou medium roast is very good.  Coffee black, don't ruin it with sugar and milk.

Other than that, just drink water, and you don't need flavored water, juice or other.  Just stay with the basics.

Beyond that, later in the day, beer and wine can satisfy.