What hand-eye coordinations drills do you use?

One thing I always enjoyed doing was to keep a small bouncy ball with you and then, when you're bored, bounce it against whatever. Whether it's the ground while you're walking or at the wall when you're just standing there, it's fun. Plus since it's so small you can bounce it kind of hard and fast so that it challenges you. And it's so small you can take it anywhere.

None.
I did try bouncing a lacrosse ball off a wall with a lacross stick. That was difficult because I'm not good. But, you can up the speed of the ball to "insanity rebound" unlike a bouncy ball.

I use juggling a lot. When I'm in a good work out pattern, I will juggle 20 minutes a day after workouts while I watch tv. I've got 3 balls down pretty well, and I try new tricks for better coordination and to keep me from getting bored. I also lay on the ground, close my eyes and throw a tennis ball in the air. I try to time opening my eyes when the ball starts back down, but the ball hitting the ceiling adds a little excitement to this because I don't know where or how fast it's coming back, and my wife usually starts yelling at me to not hit the ceiling (which adds pressure, haha!).

Tried juggling. Found out that other than my schedule, I can't juggle to save my life. I have a "bad" habbit of tossing a ball against the wall, closing my eyes and then opening them once it hits to catch it at work when I'm bored. It used to annoy the snot out of my co-worker...then she got fired and it's just me in the office now. No one to annoy now. Damn.

I also enjoy tossing water bottles that are 1/2 full as high as possible as sometimes the water that's in the bottle causes it to go wonky and have to reach quickly to catch it. Gotta entertain myself at work somehow.

I like these reaction balls. I use one before every game to get my hand-eye ready. I like it because you have to anticipate and react to the balls trajectory just as you have to do with a shooter. Another drill I used to do a lot involves two pucks, and it requires two people. Both face each other, each with a puck in one of their hands. Then, they proceed to toss the pucks at the same time. Sorry if I botched that explanation lol. The key is following the ball/puck with your eyes all the way into your hand, pads, etc...

I think i have juggling down pretty well. Im going to keep doing it and hopefully progress to 4 balls eventually. Does anyone do hacky-sac?
I was thinking that would be excellent training for goalies. Going to try it soon.

Yeah, I do hacky-sac, and soccer. It's good for foot-eye. :)

Beer drinking. It's good hand-to-face co-ordination. I use my left hand, so that if a puck comes flying at my face, I have no problems catching it
That, and video games. Not only are they both enjoyable together, but separately as well. It's a win-win.