Position can help your putting!
For a normal flat putt, a good starting
position for the golf ball is about 2 inches inside
your front foot. This allows for the ball to be struck
after the putter has reached it’s lowest point
of the swing.
When facing a down-hill putt, play the
ball slightly further ahead (perhaps 1 inch inside the
front foot) so the putter will make contact with the
ball with a little more loft than normal, thus making
a somewhat softer impact.
The opposite is true when making an uphill putt. Moving
the ball slightly backward in your stance will allow
for the club face to be slightly less lofted and cause
the ball to leave the club face with top spin which
will help the ball up the slope without actually having
to make a significantly harder swing. The less force
in the swing the more accuracy will can be maintained.