How to Lose Weight Fast. Dietician Kathleen Zelme says that breaking bad eating habits and replacing them with good ones will help you lose weight fast with no diets or workouts at the gym. It might sound too good to be true, but you can actually drop a few pounds in no time if you follow some simple effective tips on how to lose weight fast. Let’s see exactly what you should and shouldn’t do if you wanna lose that extra weight for good. Learn more about your ad choices. Visit megaphone.fm/adchoices