To control trajectory, practice using a sand wedge to hit a low shot followed by a high shot. Play around and experience this same drill with other clubs.
If you are having trouble getting your hips out of the way and swinging over the top, this drill will help. Practice using different clubs.
The Split Grip Drill is excellent to practice if you struggle with the Lever System. Working on this will help with distance and control.
Using alignment sticks to make a quadrant to set up will help you hit the ball straight and not aim to the right.