In reply to Shani: lots of material sitting in my Library.
I recommend The Abs Diet by David Zinczenko
or speak to Matt Fitzgerald or read his book Racing weight.
6 small meals instead of 3 meals the last being the largest has generally being common practice amongst Health and fitness peeps for years.
But you have to understand what they mean by meal also. a "meal" can simply mean a yoghurt some fruit and some nuts, or it could mean a eggs and bacon on toast.... to a pasta dish.
Its about not gorging on more food than your body can process in one sitting, then getting a sugar low between breakfast and lunch or lunch and dinner. So instead of reaching for a packet of crisps you have already have a healthy option keeping you fuller and providing a steady blood sugar level all day, add the right supper to assist sleep and a decent wake up.
There is a myth that eating like this speeds up your metabolism which isn't true but it does stop it dropping and help against insulin spikes. which result in that post Sunday lunch tiredness.
There is currently an ongoing study that they believe is showing that eating six meals a day keeps low levels of insulin in the system helping make your body more resistant to diabetes.
For more Info seek out Matt Kelly PT a Manchester Personal Trainer and friend who will happily help you get trim/big or whatever your goal might be. Its his job but only an interest for me so I'm sure he'd happily debate these topics to death and then convince you to pay him money.