First, eat a decent breakfast, then protect your skin as if you were going to the beach every day.
Our skin and our bodies need to be hydrated but try to "eat" your water and get the fluid you need from the water in fruit and vegetables. Also, try to snack on walnuts for an omega-3 boost.
Dr Murad's Environmental Shield range of products is available at Harrods' Urban Retreat and through www.muraduk.com
The problem - depressed, stressed skin
"Sitting in front of a PC for long stretches of time is depressing as well as stressful," says leading facialist Amanda Birch, whose clients often complain to her about their office skin. "Your skin starts to look devitalised."
The solution Amanda uses a range of techniques including lymphatic drainage massage and a dose of Omnilux light therapy to brighten dull, distressed skin. "The bright light stimulates the pineal gland in the brain," she says.
"That's the one that secretes serotonin, so the treatment works at an emotional as well as physical level, to boost the skin, improve the circulation and leave it looking healthy and glowing."
Amanda Birch bespoke facial with Omnilux, £150, at Gielly Green, 42-44 George Street, W1 (020 7034 3060).
The problem - congested skin
"It's dry, it's dull, it affects men as much as women, and it makes you look older than you are," says cosmetic practitioner Dr Vicky Dondos. "It's the end result of office life.
"Air con doesn't help but nor do stress, anxiety, infrequent meals, bad nutrition, flying, burning the candle at both ends ... The net result is a build-up of dead cells on the skin, which can make it look dull and greyish."
The solution Medical-grade microdermabrasion, a mechanical form of exfoliation, works a treat on this, swiftly removing those dead outer skin cells so that the skin regains its glow and treatment products penetrate more deeply afterwards.
"It's very effective," says Dr Dondos, "and popular with men because it's less touchy-feely than a facial. It's quick, too - you can be in and out in half an hour.
Dr Vicky Dondos, Medicetics, 37 Connaught Street, W2 (020 7402 2033, www.medicetics.com). Microdermabrasion, from £65.