If you want to know how to get the best possible McMeal, ask a former McDonald’s worker. That’s what a user of Quora did, and some of the responses were illuminating. (Quora)
Ask for fries without salt, so they have to be made fresh, then add your own salt.
Request a receipt so that the cashier thinks you might be a company or consumer spy.
Order a McDouble with Mac sauce and lettuce for a cheaper Big Mac.
Of course there are other ideas out there...