Here are several important quick reference directory links about Houston:
http://www.dmoz.org/Regional/North_A...ies/H/Houston/
http://www.bradsite.com/houston/
http://www.houstonbest.com/
http://traffic.houstontranstar.org/layers/ (Traffic Related)
Note: This information should be useful for the new visitors to the area. The native Houstonians and the people who have lived here a while will already be familar with it.