Lemon juice is an excellent item to have for cooking. Some people even use it for cough and sore throat. First, Find a suitable squeezing item. You can squeeze juice manually using a citrus squeezer or using a food processor with a juicer component. Second, Cut the lemons in half. Finally, Squeeze the lemon juice into a bowl or cup. Make sure that you get all the juice out of each half. Add some sugar and water. Enjoy your drink. Drinking lemon juice is very beneficial it helps detox your body and even support weight loss.