Eating with your non-dominant hand can reduce how much you eat.
We are all looking for habits that will help you decrease your calorie intake. I have found one that is research proven to decrease food intake.
The study was completed in 2011 and published in Personality and Social Psychology Bulletin. The two field experiments tested the conditions under which people eat out of habit and habits that would lead them to resist motivational influences. The study specifically looked at mindlessly eating of popcorn like we do in the theater. We habitually eat popcorn at a cinema and it is minimally influenced by their hunger or how much we like popcorn. In fact, subjects of this study ate equal amounts of stale and fresh popcorn. Most importantly, researchers found that subjects age nearly 40% more popcorn when they ate with their dominant hand.
The bottom line: Participants ate out of habit, regardless of freshness and ate less if they used their non-dominant hand.