Everyone knows you should keep a straight back while lifting. Yet it amazes me when I see trainers failing to recognize or correct poor technique.
The bench press is the core movement for the chest. Unlike the overhead press, the bench press is a truer test of pushing ability as it requires less support from the lower body. There are many variations of the bench press and the technique you apply to your lifts will vary between a press designed to produce mass and a press designed to produce strength.
The deadlift is the king of all lifts. It is a very functional movement that allows you to harness the full strength potential of the human body. Of all the lifts this exercises should allow you to exert the most force. Meaning on a single all out lift this should be the most weight you can lift of all the other exercises through a full range of motion.