Cool points for all, I just have a little to add

Allow an employee some control of their meal period. At my current workplace we get a 30min. meal and two 15min. breaks, but I take either a hour lunch or a 30min. lunch and leave a half-hour early (US law requires 20min. break for any workday at or over 7 hours). Also, have days, such as a monthly food-day for birthdays, that employees get some payed time off, like 30min., to talk, eat, and celebrate something, you might be suprised how much they talk about projects their working on.

That's all I have except to say, I like to work alone and headphones rock!

"Pain is weakness leaving the body, I find myself in pain everyday" -me