* Open floor plan works very well (i.e. everybody in one large room) and is much better than divided rooms.
* Have 4 rooms (with doors) available for talking on the phone, playing games, meeting, brainstorming.
* Get a dishwashing machine for the kitchen to facilitate cleaning.
* Set up a few pairing stations that people can plug their laptop into in order to move around a bit.
* I find that headphones are the great 'do not disturb' sign - even if you're not listening to music.
Currently we have one large room which feels quite chaotic, that's the reason why we are thinking of dividing the people into smaller blocks.
Separate meeting/phone rooms is a must, this is something we are trying to improve now when we move as we currently only have one meeting room which isn't enough for our needs.