Holidays are for relaxing but, if you want to keep off the pounds at the same time, invest in a Fitbit Zip. Clipping discreetly to your clothing this clever gadget tracks your steps, measuring how far you have travelled and the calories you have burned. It can even sync. statistics to computers and selected smartphones. Even better, it will help to work out your BMI and set your personal goals. Keeping fit has never been so easy!

Price: £49.99.