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34 diet & fitness tips you need to know iVillage have picked 34 of the best tips from the world's top diet and fitness gurus, to help you get started on your plan, stay motivated and reach your goals: 1. Diet for the season 'Get up earlier in summer and later in winter, in line with natural sunlight hours. Don't eat late at night or before you're fully awake.' Nutritionist Patrick Holford, author of The New Optimum Nutrition Bible (£9.74 Piatkus) 2. Stay hydrated at the gym 'Your gym may have drinking fountains but they won't help you keep an eye on how much you drink. Make sure you take a large bottle with you to the gym and keep it to hand whenever you are in class or on a machine.' Steve Shipside, author of Win at the Gym (£9.74 Infinite Ideas) 3. Shake things up 'Though there's not much scientific proof that it works, some dieters find that changing some of their meal plan selections from week to