It's important as a GM to throw in the occasional red herring, be it extra description for no reason, what time of day it is, whether the characters are starting feel hungry, or whatever. Otherwise the players get wise:
(http://nodwick.humor.gamespy.com/ffn/strips/2009-04-22.jpg)
Source: http://nodwick.humor.gamespy.com/ffn/index.php?date=2009-04-22 (http://nodwick.humor.gamespy.com/ffn/index.php?date=2009-04-22)
Good advice! All information will now be distributed via chromatic fish! :D