[Udo]

Back when we were doing our startup, we had a month's worth of vacation hard-coded into our employment contracts. Everyone got the same amount. This gave people a good measuring stick of what we expected under normal conditions. We didn't enforce the limit though, so people could take more if they wanted to (which happened very rarely). We also encouraged people to take time off, especially when they seemed burned out.

This worked amazingly well. It was one of the very few things we did right.