work chest sets last, rather than the traditional first sets to make the muscles work a bit harder. pullups, pushups, pullups, and more pushups. I try to do as many pushups as possible in a day even while working. Take a few minutes and bang out 60-70 pushups in my office. Some before work, lunch breaks, after work, waiting for the elevator at work. As many as possible in a day. By the end of the day you should break 500.