While getting my tot's hair cut for the first time, I asked the stylist what tips he had for first-time haircuts. He reminded that lil ones pick up on Mom and Dad's behaviors, and if they are freaking out, the tot probably will too. And that it's important to let the stylist do the cut, not the parent. Sure, it's a great idea to offer suggestions, but trust that the stylist is going to give your lil one a good cut. Stay out of the way and help when asked.
Source: Sarah Lipoff