Well i don't play football at any club, but i play with my friends daily on holidays and 1-2 times a week during school.
But i'm kinda good at football. I've been scouted twice by some people from FC National club in Bucharest. I refused to go though, school comes first
I can't tell you much about ball juggling, since it's useless in the actual game. But when i practice i use a different technique.
I stay infront of the wall close at around 1 meter, and i try to kick the ball into the wall, and then kick it again without letting the ball reach the ground. I do this many times with each leg, then i start to kick it once with the left leg, then with the right ... to alternate. It's good cause it improves your skill in stopping the ball. Then i start to alternate with the head also.
left leg - wall - right leg - wall - head -wall - head - wall - left leg - wall ... etc
Then i start varying on this. I try more complicated things ... I move to around 5-7 meters to the wall, maybe more ... and start kicking the ball into the wall with more power ... the ball comes back i try a stop (without the ball reaching the ground) and then shoot it back to the wall. I stop with the left leg and shoot with the right and after that stop with the left right and shoot with the left. You can try to juggle the ball a few times before kicking it back to the wall.
The wall i use has a wooden bar somewhere at the height of 3 meters. I then try to kick the ball from dropkick to hit the wooden bar. I can't hit it always, but being able to use dropkicks accurately improves your technique... (more accurate passes, shoots etc.)
Well i don't know what else to say... hope this helps ...