We set the forms so the floor falls slightly toward the garage door, so water off your car or a hose runs out instead of back toward the house. Before we pour, I'll go over with you what goes under the slab, because once the concrete covers that layer, it can't be changed.
On hot days we time the pour for the cooler hours, and nobody on our crew adds water to make the mix easier to work. That keeps the floor strong instead of leaving a top that wears into dust later on. It sometimes means an early start, and I think that's worth it.
The floor is often only part of the job. If you want the concrete leading up to the garage to look like more than plain gray, ask about decorative concrete. And if your garage sits on a slope where the ground beside the slab needs holding back, we also build concrete retaining walls.