On my new team we’ve just started our first proper iteration. We’ve agreed to commit to the following principles:

• No multi-tasking
• All new or changed code must be thoroughly unit tested
• No more than 2 pieces of work in “Active Work” at any time (our team is 3 developers)
• We always work on the highest priority task
• Our definition of done is “In UAT”
• Leave it in a better condition than you found it
• No hidden work
• No overtime
• No disruptions
• Don’t SysTest your own work (we don’t have a tester yet)