Yep, there's only one remedy for bad landings: Practice, practice, and more practice!
The key to landing well is being comfortable with flying close to the ground. People tend to get nervous and twitchy when the plane gets close to the ground. They're afraid of crashing. If you keep your wits about you and continue to fly the plane, YOU WON'T CRASH. :O
Spend a few flights just flying lower and lower, closer to the ground each time. All landing is, is flying lower and lower until the wheels touch the ground.
If you find your plane dropping to the ground suddenly, you got too slow. It went "plowing" in, you say? Too fast! Use throttle to regulate speed.