First, I would say, why would you want to lift for size as opposed to strenth? It seems silly. That being said, the way most bodybuilders lift for size is to isolate a muscle group and completely exhaust it. A good way to do this is with compound sets. Compound sets are when you pick two exercises that work the same muscle group and then do them together. So for your arms and back, you could do something like 5 pullups, 5 chinups, rest 2 minutes, repeat. Do this for 3-4 sets. For legs, you could do squats and lunges in a similar fashion. Another thing a lot of bodybuilders do is to do isolation exercies. So instead of squats for legs, you would do leg extensions that isolate just the quads. Again though, this is pretty against my philosophy of training for actual usable strength. While this might make you look big, it isn't going to help you gain functional strength nearly as fast as you could be if you were training multiplanar, functional movements. Hope that helps. Feel free to email me if you have any questions.