Cleared for take off while lined up. Release the parking brake and open the thrust levers (without holding on the brakes) to take off power. This was the standard Boeing 737 procedure in my day but a long time ago so treat this personal advice with caution. It was called a rolling start.
Or: Roll on to the runway with idle or very low power and when nose-wheel straight open to take off power - again feet off the brakes. Sometimes termed a roll-on start as against a rolling start as in first example. In other words never "drag" the brakes in the process of manoevering to line up. It is poor technique and brakes may get hot.
Last edited by A37575; 10th October 2012 at 13:46.