As a survival trait for living and working in the cites1 of London, I have a set of rituals to avoid hangovers. If you are not a single person living in a city like London, you might not understand how vital this is. Most networking, particularly in the financial services industry, is done in the presence of alcohol.
So preventing the inevitable hangover is quite important to the other part of the job – the actual working bit. I'll let you into a secret and tell you my nightly ritual: