If your front heat is blowing luke warm and you are noticing foam debris flying out of your vents, you may have lost the cheap, foam covering to the heater redirector "blender" flaps (which are perforated with 6 holes):


By removing the center console, you can gain access to the vent where the main deflector flap sends outside cold air through the heater core:



By using aluminum tape for patching vents and ducts, you can use small pieces stuck to your hand* to tape over the vent holes:



*requires contorting body and arm to reach up into the vent.

There have been other posts on this topic, including those that suggest you take the dash off. These would not have the "quick and dirty" label and will take much longer than 60 minutes to complete.
http://1705.net/archives/1085

(note: pictures of blender flap were taken by shoving iPhone camera up vent and using the photo timer)