Before you start on any weight loss plan, take a step back and really look at your lifestyle, your likes and dislikes. Are you constantly on the go? Do you want to be able to eat the same stuff as always? What cooking methods are available to you, and which ones do you regularly use? Do you prefer going to the gym or are long walks more up your alley? You really have to lay out your lifestyle almost like you were setting up an e-harmony account in order to be able to match a diet to your unique lifestyle and traits.
If you think you can just pick up any old diet without thinking it through, you might indeed lose a few pounds initially, but you may actually gain some weight in the end as well. It's funny how that works, but sometimes, choosing the wrong diet can backfire and cause you to bounce back to your old habits very quickly and more intensely than before. Some great examples of how that can happen are when you follow diets that deprive you and then you snap, throw in the towel and gorge, or you get a gym membership and go regularly, then realize it's not for you, but you don't adjust your food intake to make up for the lack of exercise.
First and foremost, when devising a plan to help you reach your health and weight loss goals, think long-term - sustainability is key. Find something that you can really stick with and be proud of, and the results will show before you know it.