Struggling getting the ball to the hole

I am continually plagued by the same problem. There's loads of long putts at my course, so usually face 3 or 4 a round and i could not get it up to the hole from over 20 feet. I'm confident from anywhere under this that i'll hole. By far the biggest tip i could give is to go out one night and putt everything whilst looking at the hole. I guarantee you will not leave a putt short doing this. It means you are putting purely on feel. When i'm hitting a putt from anywhere now i stare at the hole for a good while, then start my putt almost before i've looked at the ball again. Made a massive difference to my game