Whatever you do, track it.
Write down or photograph everything you eat. Keep a workout journal, etc… This single step outweighs every other single line tactic, since it allows you to have a constant measure across all the things you try, and to better understand over the long term, which things are working for you. I'd also recommend tracking anything but weight… Body fat, muscle mass, water intake, anything. Weight is the least reliable, since you can gain weight due to muscle gain, which still makes you healthier and more attractive than simply losing weight while, say, retaining the same amount of body fat.
What are the best one-liner principles for dieting and exercise?
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