Newton’s Universal Laws of Styling: Law #1: A disastrous haircut will persist in its state of devastation unless acted upon by styling genius Kent Newton (of Mario Russo at Louis Boston) and his team of experts. Translation: A full roster of services (updos, color processing, Keratin complex treatments) will return hair to its stunning roots. Law #2: Hair recovery and peace of mind are accelerated by environmental forces. Translation: The loft-like space soothes with chic, minimal decor. Crystal chandeliers, sheer curtains, and sleek seating combine to create an irresistible mod-meets-glam energy. Law #3: For every appointment made, there is an equal and opposite reaction. Translation: Frequent effects include whiplash-inducing head turns and excessive compliments. Kent Newton Salon, 1315 Washington Street, South End (617-426-2640 or kentnewtonsalon.com).