I had a "drill" years ago that I return to very occasionally, good for accuracy and speed. Pick a driving range/practice area with distance markers, my course has these at 100-150-200 yards. Tee the ball up with your driver and start out at 100 yards, land as close to or hitting marker as you can.
Once you're consistently landing in your "zone" go for the 150 marker, repeat the exercise, eventually moving out to 200 and beyond. For me it gets the face and swing path consistent; all you're doing with the longer distances are swinging a bit longer, and clubhead should be moving faster with the extra travel it has to do.
Sometimes I try and imagine yardage markers on the fairways during a round to give me "focus".