Start with a haircut that leaves the back longer than the top and sides
Let the top, sides, and back grow out evenly
Trim the sides and top lightly to keep the shape controlled
Keep the back longer than the rest at all times
Ask your barber for a mullet shape-up every few weeks
Use hair products to manage texture and hold
Wash and condition your hair regularly
Avoid cutting the back too short during maintenance trims
Grow the hair until the contrast between lengths is clear
Style the mullet to suit your preferred look
Be patient while the top and sides catch up to the desired length