I need some helpful tips on how to build muscle properly?!

I need some helpful tips on how to build muscle properly?

I'm a male. I only weight 115 pounds, I about 5'1ft, and I'm 17yrs old.

Hey there.
The key is to start out with good form, doing a full-body weight-training program with cardio. It's important to run at least a mile 3 or more times a week... this is good for your heart and lungs and gives you more endurance for your muscle building.

You can go to the link below and it will show you exercises you can do at the gym or at home. It is important to build steadily, and work out at least 3 but preferably 5 times a week. Every 2 or 3 days, take a day off so your muscles can repair themselves (this is VERY important, as it is on your days of rest that the muscles are actually building mass). Avoid doing the same exercise two days in a row, because that can cause tissue to be damaged more than the desireable amount - which can actually lead to a LOSS of strength.

A good protein shake and glutamine are good for you - protein is helpful in building more mass, and glutamine is helpful for the microscopic tears that occur in connective tissues.

Above all - find your motivation, compete with yourself and keep at it. When you have your setbacks, don't let it get to you. Everyone has them. The important thing is to go back the next time and give it the same try. And eventually, over time, you will build muscle. Give it 3 months of steady work and you'll start to see real change.

Good luck!

UPDATE -
Oh - and by the way, AVOID steroids and those heavily-advertised "miracle pills." They are all bad for you, with few exceptions. Get lots of Vitamin C, Vitamin E, your protein and glutamine, Resveratrol and fish oil. Those are all helpful with basic good health, which will give you a better foundation for your strength training.