Lemon is the new cure-all. Find out how it can change your life. Next time you see not-quite-ripe green lemons at the market, grab them! Slice a lemon into four pieces and place the fruit on a plate. Surround the citrus in a circle of salt and place the plate under or next to your bed stand. According to Healthy Magazine 365, doing so will clear your bedroom of any negative energy. The citrus absorbs the negative energy, so it is crucial to toss the lemons immediately the next morning.