Take position on a bench inclined to around 30-45 degrees. Any higher than this will take the focus off your chest and place it onto your shoulders.
Place your feet flat on the floor, take a medium-width grip on the bar, retract your shoulder blades and arch your back slightly. Un-rack the bar so that your are at full arm extension above your chest and settle yourself. This is the starting position.
From this starting position, lower the bar over 1-2 seconds as you breathe in. The bar should just touch your upper sternum at the bottom of the movement but without bouncing off the chest.
Raise the bar over 1-2 seconds, squeezing the chest as you breathe out and return to the starting position.