Use appropriate kite for your experience level. As a rule, ride within your skill level. Overpowered riding is very dangerous. Do not ride on strong winds with too large kite. Also, use the kite on wind conditions and speed that are specified by the manufacturer.
Check the weather forecast. This goes to anyone regardless of the skill level. Knowing the wind speed and direction is critical to determine whether it is safe to kitesurf or not.
Pay attention to the changing weather condition. Aside from taking note of the weather forecast, be aware of the changing weather while you surf. Wind speed and direction should be monitored carefully. Watch out for the sudden gust of strong winds as it can throw you off balance and carry you off to places you don't plan to go.
Launch and land the kite with care. Most accidents happen on shore or when the rider is about to enter or leave the water. If the kite is on air, do not spend time on the shore. Once the kite is in the air, leave the beach right away. When coming in, land as fast as possible. Keep the kite low when on shore.
Never hit the water without a safety knife. Tangles often happen when the kite is hit by a wave or a sudden gust of wind. This is very dangerous since the rider cannot control the direction of the kite. Also, tangled lines can cause serious injuries and deep lacerations to the body, fingers, toes, and limbs.
Under no circumstance should the rider allow himself or any part of his body to be encircled by the lines. Cut immediately using the safety knife to escape being caught by the lines.
Finally, fatigue can cause danger to the kitesurfer. When you feel that you are getting tired riding, go back to the shore and take a rest.
Do not take chances. Kitesurfing should be fun but it should also be done safely. Seriously, never attempt to do anything stupid.