Here's the way I do my workout, its not the normal way but there are some people that do it this way. This isn't including warmups. I start off with my heaviest set first for at least 8 reps, then drop down like 10lbs for the next set and get like 10 reps, and then drop down another 10lbs. and do at least 11-12 reps and then I usually do a fourth set at the same weight till failure. I used to do pyramids where you start off light and then you end with your heavy set, but I'd be at the gym forever. Another way, that I used to do too that worked good is you do your light set first then you move up to your heaviest weight, then next set drop down to your medium weight and then maybe another set at that weight. But I'm always asking the manager at my gym and other bb's which is better the way I do it with heaviest first or the last way I said, and I always get different answers, so its whatever feels better to you.