Yup, with you there, I always use one bucket and rinse the sponge.
I start with blasting with a pressure washer before the shampoo, start from the roof and work my way round the car gradually going down if that makes sense. I always do the wheels last and use the same car shampoo bucket, I never use wheel cleaning spays.
I then give it a wipe down to dry it, clean all the windows inside and out with window spay and finish up by polishing. once the polish has dried and i've buffed it off I always give the windows a quick buff with the same cloth (the cloth with dried on polish). I find that once it rains the water runs straight off the glass. Make sure you don't get any wet polish on the windows as this can go hazy when wet making it very difficult to see out.