Normally I'd advise as much sleep as possible but if you don't have that option take four painkillers (your choice, the stronger the better in my opinion), wash down with a quadruple Kahlua topped up with milk in a pint glass. Down in one. Followed by a toasted bacon, cheese and tomato sandwich smothered in Sriracha hot chilli sauce. A jug of fresh coffee and some fresh orange juice. Take a long hot shower and you're ready to go again. The fresh air that hits as you leave the front door will also be beneficial to your sense of well being. If travelling on public transport try not to engage with anyone. Do not make eye contact. They mean you harm. Wear shades. At work, keep your head down and get on with it. Oh, and take your shades off. You'll look a prat.