Keeping hydrated is one of the tricks when loosing weight. Many times people think they are hungry, though really they are slightly dehydrated. Once you start drinking water throughout the entire day, you will see that you end up eating less, and will lose weight. You will also be constantly flushing out all the toxins in your body.
Changing your schedule around can make it a lot easier to stay on a diet. For example: Overweight people used to eating three meals a day are obviously snacking in between, so if you change around your schedule and eat smaller meals at closer intervals, you can avoid those junk-food cravings by eating healthier, small meals.