Is there any quick way to lose weight at once? But if you can master some dietary tips, it will be very helpful for you to lose weight. You might as well try: 1. Set a weight loss goal. 2. Write a weight loss diary. 3. Drink plenty of water. 4. Be persistent, and then persist. 5. Control calories and fat. 6. Eat lightly. 7. Eat fruits and vegetables regularly. 8.