(1) From the incomparable Art of Eating: stir your drip coffee.  As you pour water over your grinds, stir the coffee for maximum flavor extraction.  It works.

(2) If you’re stuck using a hotel room coffee maker, run it with water but no coffee once to warm it up.  Regular coffee makers are notorious for under-heating water, so this tip makes sense.  I don’t remember where I heard it though.