Here are some video links with Strength Coach Mark Rippetoe discussing the proper form and technique to execute a deadlift. Take a look:
http://www.youtube.com/watch?v=MX8jgCFXYTU&feature=PlayList&p=C2F0302FA5322D68&index=0
http://www.youtube.com/watch?v=sP4FwBkuK6o&feature=PlayList&p=C2F0302FA5322D68&index=1
http://www.youtube.com/watch?v=5ocCK4BSIMI&feature=PlayList&p=C2F0302FA5322D68&index=8
