Careful with the loose advice guys...

There is a whole school of thought (Bobby Clampett) that promotes hitting down on the driver...in fact, he wrote a whole book on the subject...

Breaking 80: Bobby Clampett: Breaking 80: golfdigest.com

Bobby Clampett—The Official Website

Great book btw with alot of concepts not found commonly but very practical...worth a look...

I do this and have found that it breeds consistency as the swing is much more uniform from club to club, woods to irons...