When you place your left hand on the club you should have the feeling that your thumb is more or less on the top of the shaft. Whilst looking down you should see two knuckles on the back of your hand, the crease formed between the first knuckle on the index finger and the thumb, should be pointing to your right ear.
The correct feeling is that your left hand is just sitting naturally on the club, with a slight angle that is created at the back of the left wrist, exactly the same feeling as if your left hand is just hanging by your side. If there's no 'angle' it may hinder the ability to hinge your wrists during the swing. With this in mind, grip a little more firmly along the bottom of where your last three fingers are gripping. The left hand should feel secure at the top of the backswing and at impact where the grip is susceptible to loosening. A tight fit between the fatty part of the palm and the last three fingers will give the left hand a firm feel of the overall grip and club.
Make sure that the paddy part of your left hand doesn't extend over the top end of the shaft, this is important to check, as it may not add to better looking swings it will help for greater control. The left-hand positioning is important because it is a direct reflection of where the club's clubface points or faces at impact -- that obviously will dictate where the ball will end up.
Out of Bounds: There are three things that stress me; 1. Hot days 2. Annoying people--and 3. Hot days playing with annoying people.