If you get bored with the wall, start to do more match play with your friends. Maybe just got to the wall once a week. I think Mint covered exactly how wall drills help you.
The wall also helps improve your overall speed of play because the motions have been "programmed" into your brain and muscles. This lets you control the ball quickly, almost without even thinking.
Once I "mastered" the all the wall drills on this page:
I started improving my field vision and real game skills by playing with my friends in matches.
I also invented my own drill:
Find two walls anywhere from 3-5 yards apart.
-Pass with one foot. The ball comes back
-Trap with the passing foot. At the same time your are turning and setting the ball up to pass with the planting foot to the other wall.
-Pass with the other foot.
-Trap with the passing foot...etc
To challenge yourself, do the drill faster.
*Important: keep good passing technique and balance. There is nothing worse than practicing bad technique.
Trap with the passing foot.