Buy a fat gram counter and add up your fat intake daily, aiming at 30 to 35 grams a day. Remember to keep healthful foods in your diet and not to overly rely on fat-free junk food. Keep a food diary. Look up a sample food diary in the Four Get Fit program. You can use this form to track your food intake.
Research shows that people eat less just by keeping food diaries.
Your exercise was not defined. For weight loss, you need to work out 45 minutes of aerobic activity three to four times a week. Since muscle is very metabolically active, you need to protect your metabolism while cutting calories by working and building your muscles. Do not cut your calories too low, you only will break down muscle and decrease your metabolism. As for your acne question, there seems to be no real relationship between diet and acne, except that a good healthy diet supports vibrant skin.