Get a doctor’s approval for someone who has injuries or whenever you are in doubt.

Always listen to your body. Warm up properly. 

You might have to come up with alternatives if you a have specific condition preventing you to do some movements.

If you do not feel secure about doing an exercise, find an alternative.

There is no substitute for good judgment and common sense.

Always pay 100% attention to your surroundings and to the kettlebell you are exercising with. 

Train on a flat surface, free of clutter, with enough free space around you. Remove rings and watches.

Work within your limits, be it strength, heart rate or flexibility.

Follow the learning progressions, build the load slowly (be it reps or weight). Do not skip steps or rush to test your strength and skills.

Generate power through the hips, not the arms. Keep the arms loose in all ballistic drills. Arms are just guiding the trajectory of the bell.

Do not over-extend the wrist in lockouts! The handle should rest against the palm of the hand, wrist kept in a neutral alignment.

Do not round the back under a load. Keep your chest up. Look ahead. Weight on the heels, never on the toes.

Do not overly arch your back or neck in the lock out position. Use your eyes first to look at the kettlebell if you have to.

Keep the knees tracking in the same direction as the feet.

Make sure you can always drop the kettlebell or push it out of your way if things go wrong, and get out of the way quickly.

Do not over reach or try to recover an unbalanced rep, let the kettlebell drop.

Be aware that a kettlebell generates extra forces when free falling from an overhead swing. Be ready to shift your centre of gravity backwards and brace your core to compensate the effect of the forward pull.

Brace your core when lifting heavy or difficult lifts and use power breathing/ valsalva when necessary.

Keep moving in between sets, once the heart rate is high. It helps push the blood back to the heart without unnecessary stress.

Developing proper timing and technique to avoid bruising the forearms when doing cleans and snatches takes time. Wear wristbands. Use assistance from your other hand after you get comfortable with the 2 arm versions.