Train to hit the ball further by swinging something light like a shaft as opposed to a heavy weight, this will help increase your swing speed
Keep you putting simple by developing an easy one-two count, take your backswing on the one count and the your through swing on the two count and create a constant pace to your putts
One of the main reasons that balls curve in the air, slice or hook, is simply the amount of loft the club you are using has, the less the loft the greater the sidespin and the bigger the curve