There are a few key things you can do to increase your sperm volume fast. First, make sure you are staying hydrated by drinking plenty of fluids throughout the day. This will help to thin out your semen and increase your overall sperm volume. Second, eat foods that are high in antioxidants and zinc. These nutrients have been shown to improve sperm health and increase sperm volume. Finally, avoid smoking and excessive alcohol consumption, as these can lead to decreased sperm count and quality.