Close grip pulldowns

Keep your chest up and elbows in.  Squeeze the lats down instead of using your biceps. Try to touch the handle to your chest.  This exercise is for thickness and width in the lats.

Reverse grip pulldowns

(not pictured) Hold the bar with an underhanded grip at shoulder width.  Keep your chest up and elbows in.  Squeeze the lats down instead of using your biceps. Try to touch the bar to your chest.