Sin Number 4: Eating Too Much

Eating too much is a problem, even if you're eating too much of the right foods. This is very typical of "foodies", who eat plenty of delicious foods like olives, oily fish, brown bread, olive oil - too much of the right thing can still be the wrong thing. Even if your plate is loaded with low fat veggies, low fat protein and complex carbohydrates, if it is groaning under the weight of your food and you're ploughing your way through the entire plate thinking "It's okay - it's all good for me!", you could still be taking in far too many calories. 

Fix: Be sensible! Measure out portions, at least at first, and eat only until you're full. Don't pile your plate high.

Sin Number 5: Eating At Night

So you eat a tiny breakfast, a salad for your lunch and a dinner of chicken and green vegetables. You've had a good day, right? Yep - but then you reach for a bag of chips and a tub of ice cream at night, completely derailing your diet. You do this because you're hungry, and because you are not meeting your daily energy needs through the day. 

Fix: Eat 2/3 of your daily calories before your evening meal. Your body needs energy whilst you're awake and moving, so give it the energy it needs.

Sin Number 6: Believing Everything You Read

As a nation, we're a sucker for a good diet book. We love reading about the latest diets and in fact, the diet book industry runs into the millions of pounds each and every year. When celebrities and experts publish a new book detailing a new diet, we want to read it - we want to know what the secret is. 

Fix: Read expert books if you must, but check that the author is properly qualified and that their advice has been tested and studied adequately. Research the book online and don't just listen to the marketing hype.

Read More: Five Awful Diets You Should Never Try

Sin Number 7: Cutting Out Sugar

Cutting out sugar completely is actually really common. Sugar becomes public enemy number one for many weight lifters and dieters and for some, cutting out sugar can actually increase your cravings.

Fix: Schedule a sugar fix once a day - after your workout. Sugar is easily burned off after a workout and you'll satisfy your cravings.