Wrap your hands properly before putting on gloves, since hand wraps stabilize the many small bones and joints in the hand and wrist, and skipping them significantly increases the risk of a fracture or sprain even during light bag work. Keep your chin tucked and hands up near your face by default, since dropping your guard between punches is one of the most common habits that leaves beginners exposed even when they aren't actively getting hit. Rotate your hips and shoulders into every punch rather than swinging with your arm alone, since power in boxing comes from the legs and core transferring through the torso, and arm-only punches are both weaker and easier to see coming. Exhale sharply on each punch rather than holding your breath, since holding your breath while punching tenses the body and reduces both punching speed and the ability to react quickly afterward. Learn basic footwork and how to move around an opponent before focusing heavily on punching combinations, since good positioning determines whether a punch even has a chance to land, and combinations thrown from bad footing are easy to avoid or counter. Start with a lighter bag weight or padded mitts rather than a heavy bag when you're new, since punching a heavy, unforgiving bag with incorrect technique repeatedly strains the wrists and knuckles before your form has had a chance to improve.