Just remember when you are landing the following applies
Throttle adjusts your Rate of descent
Elevator adjusts your forward speed (and therefore where you will actually touch down).
I know those rules are very simplistic but think about it. Airspeed creates lift so use the throttle to control the sink rate. the elevator will control the attitude of the plane - If the nose is high, you will need more throttle to keep the plane airborne but the forward speed will be low (think of a Harrier). - the reverse also applies.

Use your throttle to fly towards where you want to land. Adjust your speed to control your rate of descent and keep the rate of descent low. When you are very close to the ground (About a foot), reduce the throttle to idle or zero.