My favourite chill out tune at any given time is that tune which enables me to reach my 'zen' state, being that state mind where I am fully focussed on whatever it is that I'm doing at any given time and one which motivates me to do whatever it is I'm focusing on trying to achieve. The tune must be one which enables me to achieve this state of mind as quicky and efficiently as possible. I absoutely MUST be able to listen to my 'zen' tune at work. This tune is my current 'zen' (aka chillout) tune