Another trick is to draw a changing path.
If you have the opportunity to approach to an airport where traffic conditions allow you to do a non restricted descent. On perf init, set the speeds to 210/.64/3.5 when between 41k to 43k LW with no wind and create a PBD at around 45-50 miles to add a constraint of 13000' in order to obtain a path of 2.5 degrees for the remainder of the approach (here lies the key).It will let you to descent around 290, slow down to 250 by 10000' and position within flap extension speeds at 5000' provided no wind. It will keep you in idle saving some fuel. FMS speeds should be used throughout the descent.
Happy landings!!!
Last edited by ClimbSequence; 30th May 2013 at 05:39.