6 tips.

TIP 1: FOCUS ON LIFTING MORE WEIGHT OVER TIME
The first bodybuilding tip that will make the single biggest difference on your rate of muscle gain is whether you are able to consecutively add more weight to the bar.

TIP 2: GO ONE REP SHORT OF FAILURE
The second bodybuilding tip to pay attention to is the rule on failure. Some people believe that lifting to failure each and every single set is the best way to build muscle. They think that in order to get a muscle to grow, you have to fully exhaust it.

While it is true that you have to push the muscles past their comfort level in order to see progress, you can run into a number of problems when you're lifting to failure each and every set.

TIP 3: ONLY PERFORM EXERCISES THAT WORK AT LEAST TWO MUSCLE GROUPS AT ONCE
Bodybuilding tip number three is to focus on compound exercises. You only have a limited amount of time you can spend in the gym each day due to both time and recovery restraints so if you waste this time on exercises that only work one or two smaller muscle groups, you aren't exactly maximizing your potential.

TIP 4: FUEL YOUR BODY RIGHT BEFORE AND AFTER THE WORKOUT
The fourth tip to follow with your bodybuilding workout program is to make sure you're fueling your body properly both before and after the workout.

TIP 5: NEVER GO MORE THAN TWO WEEKS WITHOUT A CHANGE
Fifth is the plateau busting bodybuilding tip. If you've ever reached a point with your workouts where it feels as though you are just not gaining any more muscle, this is a sure sign you're in a plateau.

TIP 6: REMEMBER REST IS REQUIRED
Finally, to end off our bodybuilding tips, always remember to rest. Far too many people make the mistake of training too hard, too often, without allowing time for recovery.


And here are some additional 4 simple rules:

1. Never go 3 days without exercise
2. Workout at least 4 days a week
3. Never miss a Monday
4. Never give up 

Reference:

http://www.bodybuilding.com/fun/6-bodybuilding-tips-faster-results.htm