Now that you have the proper descent path set up, you should be in a nose DOWN angle with little power (around 20%.) Once you get over the runway, or can make a safe glide to the runway, and are hopefully around eye level above the runway reduce power to idle. If the engine is at idle with the airplane still 100 feet in the air, you may be trying to come in with to steep and approach angle, go around and try again! Now what is an airplane with NO power ... A BRICK! The airplane will naturally fall from the sky. So don't worry about making it come to earth it will do it on its own! What we want to be concerned with is ARRESTING that fall! How do we do that? Easy, the airplane in a nose low attitude is actually flying forward, and this gives you energy! We need to use that forward energy to arrest the downward energy by pullting back on the elevator stick! This does 2 things it will raise the nose AND slow the airplane! Now we don't want to get the airplane to slow! So as soon as the airplane is in an attitude that will NOT let a nose wheel hit the ground first, you are set up for landing. Just hold that attitude until the airplane is a 6" - 12" off the ground and if the airplane starts to sink to fast, pull back SLIGHTLY on the elevator. This will level the airplane off for a second as the speed slows down, and then the airplane will start to slowly sink again. If the airplane starts to sink to fast again, repeat procedure above until you have the elevator full back. If the airplane is not on the ground by the time you have gotten to a full back elevator stick position, you may want to add power and go around and try it all over again!
I'll make one comment; ALL of this, from passing the runway threshold to touchdown, will take no more than about 5 to 8 seconds, so it's a lot to remember/think about. (Watch the second hand on a clock.)
I'm guessing that you're not too far from good landings. Most likely, you're touching down nose low (nose wheel first), OR touching down with too much speed. Yes, it's also possible to stall the plane just before touchdown and have it bounce, but it's much less likely. Besides, bouncing 3 times tells me you're carrying too much speed.
As was mentioned; if you're flying from a paved runway the bounce is much more likely to occur.
Good luck,
Dennis-