Have your hair cut so it is shorter at the back, in layers at the bottom, sides sloping down to the front hair, and longer at the sides to the front (an old Vidal Sassoon/Mary Quant 1960s look), it will look good on thick hair, make it swingy, great with a fringe too. Also highlights will give it some depth. Make sure you go to a recommended hairdresser for the cut and the colour ... and not a junior trainee as this would be cheaper (but you may be disappointed with the cut), its worth paying for a senior qualified stylist. I wouldn't recommend a hairdressing school or Academy for cutting either ...