Want to lose some weight? Here’s a tip. A new study says that making small changes in our diet over a stretch of 25 days or more every month, goes a long way in helping shed the extra pounds. Led by Brian Wansink, professor at the Cornell University's Food and Brand Lab, researchers launched the National Mindless Eating Challenge (NMEC), an online healthy eating and weight loss programme that focused on simple eating behaviour changes, instead of dieting. NMEC participants, after answering questions about their eating goals, background and well-being, were sent three customized tips to follow for a month.