Lift heavy or go home
Oh, you think "the pump" is going to build muscle? Think again. The only difference between strength athletes competing in a weight class and bodybuilders is the amount of calories they consume. But the basics remain the same: heavy squats, deadlifts, barbell press and chinups is whats going to force your body into growing.
A gallon of milk a day
Not skim but WHOLE milk. It has been recommended by Mark Rippetoe, and he has said it works 'better than steroids.' Now adays the milk probably has enough hormones in it that that statement is not too far off. I take a few scoops of muscle milk, mix it into half a gallon and drink it periodically throughout the day.
A good multivitamin: Orange TRIad
Dare I call this product "The bulking multi"? It has digestive aid for the massive amounts of calories and milk being consumed, and also has joint support for your heavy loaded barbell. In all seriousness, you need adequate vitamins to process all the food and training your doing. Better not skimp and buy the drugstore brand. Pick a multi that was designed for bodybuilders.
You have to think big with everything you do: lifting, eating and sleeping. I follow the "seefood" diet, when you see food, eat it. Lean bulks are all well and good but I'd rather get more calories than I need and put on a little bit of fat, rather than not eat enough and not grow as much. Dieting and cutting is for the summer time, allow yourself to eat when your bulking. I'm not saying go out for a big mac and wash it down with a milkshake. But when your a few years deep in the game, it's going to take alot of calories to add muscle onto an already 'muscled' frame. Eat big.