[MetroMPG]

If you're coasting engine off, doing anything other than rolling to a stop will lower your potential fuel economy. Yes, we're talking about tiny differences.

If you're idling and moving at a low speed, then yes, you should just go ahead and park.

The take-home message is: avoid the brake pedal. Parking is one time you may have the option of rolling to a complete stop because there's no set 'stop line' if you have flexibility on which spot you can choose.