Here are my favorites:
http://www.audioasylum.com/audio/vinyl/messages/1240.html
http://www.deadwaxcafe.com/vzone/cartalign.asp#vta
http://www.walkeraudio.com/fine_tuning_your_turntable.htm
http://www.tnt-audio.com/sorgenti/vta_e.html
http://www.theanalogdept.com/tonearm_alignment.htm
http://www.audioasylum.com/audio/vinyl/messages/1240.html
http://www.deadwaxcafe.com/vzone/cartalign.asp#vta
http://www.walkeraudio.com/fine_tuning_your_turntable.htm
http://www.tnt-audio.com/sorgenti/vta_e.html
http://www.theanalogdept.com/tonearm_alignment.htm