I find logging calories as accurately as possible is the best way. I work on a calculation of [goal weight in pounds x 12] for weight loss - you could also go [x 10] for rapid weight loss, but I find that too low and not sustainable. Stick to that many calories as your daily average every week for a period of 4-6 weeks (meaning some days you can go over and some days under, but always ending with the goal number as the average for the week) and you will definitely see results. Good luck!