You can monitor and improve your reaction times at my website here:
Feel free to bookmark this, as I have had this link up for 10 years, and plan to keep it up so I can monitor my own reaction times as I grow older.
I also suggest playing computer games to help your hand-eye coordination. Foosball is also awesome for this.
Another tip to help:
When you have something in your left hand (for example), and need to get it in your right hand, don't just pass it over. Throw it over. The item will be in the air for only a few inches, but this will help you hand-eye coordination and reflexes.