Keep a food diary. Carry a notebook with you and write down everything that you eat and drink, and the time of day. You may begin to notice a pattern. Do you tend to snack during the late morning? This could be because you skipped breakfast. Do you fill up with snacks after dinner? You are probably snacking while watching tv, and aren't even aware exactly how much you are eating. By focussing on these patterns, you will be able to change your habits accordingly.
Are you trying to lose weight in order to fit back into a special pair of pants or dress? Inspire yourself to get back into that outfit by hanging it up somewhere where you will see it. Next time you are tempted to overeat, the visual reminder of the goal you are working toward, will help you stay on track.
A great way to lose weight is to write down how you feel about yourself and why you want to lose weight. If you struggle when dieting, you can always refer back to what you wrote. It will remind you of why you ventured to lose weight in the first place.
A vital step in weight loss success is understanding portion sizes. Get in the habit of reading the nutrition label before you eat or drink anything. Although the carbs and calories may look fine at first glance, you will often be surprised to find that there are two, three or more servings in that one bag or bottle.
When you are on a diet to lose weight, set up a day of the week or month where you have an "off" day. On that day, allow yourself to eat that junk food you've been craving. Telling yourself you can never eat ice cream again, for example, can just lead to breaking your diet.