Do what the majority of parents do when flying with babies, get on board first but still have the aisle full of your bags when the rest of the passengers get on, expecting the crew to lift them into the overheads. Let the little $hitter scream its lungs out while being seeming unaware of it making a sound. If traveling in business class its especially important to be the only person sleeping while the little one howls for 9 hours, wouldn't want everyone to take advantage of their flat beds and miss out on the joy of a babies cry now would you. You should also let them sit on your knee unrestrained or crawl around the aisle when the seat belt sign is on. Don't forget to act like the most important people on the aircraft, someone else will take away those dirty nappies(diapers), used baby wipes, etc etc.
Flying with babies is no fun for everyone else on the aircraft.