* Keep breakfast simple: Dieting does not mean having to prepare fiddly or intricate food. Sometimes the simplest options are the best. For example, opt for porridge over sugary cereals for breakfast and make sure you add some fruit so you tick off one of your five a day before you reach your desk. Porridge is easy to make and will also help keep you full until lunchtime, so will prevent your reaching for the biscuits mid-morning.