Quite agree Blup but people often say you should practice putting because you take more putts than any other stroke in the game. It may be true but you've got to get there first. I used to often just use an iron off the tees. Great accuracy - never lost a ball - but it basically adds 10 strokes to your game - maybe 5 or 6 if you account for a reduction of accuracy with a driver. But the answer to that is practice the driver isn't it?
PS. I'm no great golfer. My best handicap has been 12 and I generally play of 18, but not for 12 or 13 months due to shoulder surgery.