Building muscle takes a long amount of time if done correctly, and done ethically. But we can shorten this lengthy process quite a bit by following some general techniques in exercising, nutrition, and scheduling.
The first thing to note that if the body is "hungry," it isn't going to build muscle. That means one should always have some sort of food in them- fasting is usually a poor idea. In particular, the body needs protein to help build the muscles being worked out. Steak, peanut butter, and special shakes or candy bars are usually good sources of protein.
It is constantly in the news how some athletes "cheat" in their profession by using steroids. This is because steroids build muscle mass at a very quick pace, at which normal athletes couldn't keep up with. It also presents serious health risks that can prove to be critical to one's own health. Clearly, one shouldn't use steroids unless they have a valid medical reason and counsel from a physician.
As previously mentioned, hydration is another thing that can count against muscle building if not observed. When the body is dehydrated, it will send a signal to the one working out to go get a drink. At this point, the body is already hydrated- which goes to show that drinking a bit of water every now and then can help one keep hydrated through an extended workout. This allows one to workout longer, and gain more effect from a routine.
The actual workout can now begin after one's body is properly nourished. A workout should be strenuous enough to tire the body, but not so much that it pulls muscles and ligaments. A trainer can help a consumer through the process of building muscle mass the most effective way, as they can take different factors about a person and make a customized routine for working out.
Be very careful not to overwork the body. There have been many documented cases where muscle will actually start to deteriorate from exercising it too much. Other times, muscle may expand too quickly, usually with the use of steroids, and seriously rupture muscle tissue. If this occurs, regenerative therapy will have to be ensued, and progress will be lost.
Final Thoughts
Seeing results can sometimes take a great deal, so don't be discouraged with progress being slower than what you'd like. Also be sure to take breaks, get plenty of sleep, and enjoy the healthy body you are in the process of creating.