Always have healthy snacks available in your fridge and pantry. Purchase a big container, made of plastic, with a cover. Purchase fresh produce like celery, carrots and radishes. One easy tip is to partially fill a container with some water and ice. Prepare your vegetables and place them in the container and store in the fridge. Having this healthy ready to eat snack ready to go will reduce the temptation of a quick bag of chips.
Try to avoid any fad diets, like 30-day programs or diets that prohibit eating whatsoever, i.e. liquid diets. While these types of programs might produce short-term results, they do absolutely nothing to get at the root causes of why people gain weight in the first place. In other words, they're worthless.
Totally eliminate mayonnaise from your diet because it can pack on a lot of fat and calories to your diet that you really do not need. You can add an additional 200 calories to your sandwich by just adding mayo. There are low calorie alternatives like mustard and horseradish.
Many times a restaurant will give you way too much food for a meal. If they let you, order off the kids menu. The portion that kids are served are really the amount that an adult should be eating. If they won't let you place the order, order your meal from the appetizer section.
It doesn't matter if you are attempting to lose a few pounds or a few hundred pounds, the same principals will get you to that final goal, either way. This article has outlined those basic principals and a few more to get you to that ultimate number on the scale.