Aim left.
Just kidding. This may not help you at all but I'm going to tell you anyway. I was having similar problems, especially with the short ones.
Watching a little golf on TV I noticed a few of the players lining up and then taking 2 or 3 good looks at the hole, or their target before the putt.
I tried it and it helped. I think it just gets the stoke ingrained in your head before turn it loose. It's even helped my distance with the longer ones.
Now if I could just get my full swing worked out.
