The TNT Sameday campaign, created by Warwickshire-based Rees Bradley Hepburn, is targeting 40,000 companies to help secretaries, personal assistants, managers and board directors manage their stress levels.
The promotion features a series of TNT Sameday postcards showing workers how to ease anxiety and stress with tips on feng shui and reflexology.
Customers will receive a free orange Kit Kat chocolate bar, and the promotions ties in with Nestle's new Kit Kat campaign, which uses the "Make the most of your break" tagline, created by JWT.
After customers have used the company for the first time they will also receive a coffee mug and a packet of Kit Kat Kubes.
David Williamson, divisional general manager of TNT Sameday, said: "We live in an 'instant' world where people want something and they want it now. We have the largest share of Britain's annual £650m same-day express delivery and collection market and our approach is to create an exceptional customer experience."
There are 50 Sameday centres placed around the UK supported by 1,500 bespoke courier vehicles.
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