When the tickets go on sale in May, call MS and order your tickets though them. They will be able to tell you which nights have a Member discount or an advanced purchase discount. The Member discount is better than the advance purchase discount so try to pick a night that has a Member discount. Keep in mind that the Member discount is only offered for about 4-6 of the dates and there has never been any discount available for Halloween night or the night before Halloween. The Member discounted nights have normally been offered on Tuesdays or Sundays, never on Fridays.