Know your limits:
You always have to know your limits, If you go past them you're likely to get scared and start worrying. If you usually jump into the water off a 1 metre rock and then see a 15 metre rock and think how about I jump off that! Then you climb up and look down then you start shaking it means you have gone way past your limits.
If in doubt stay out!
If you are not sure of something don’t do it! Don’t let people get to you if they start teasing you about not doing it, you have to be sure about whatever you do before you do it or you could be in real danger like if your friends say come on let's swim over to the other side, you say that you are not to sure because you're not a confident swimmer and they start teasing you but still don’t do it no matter what they say and do!
Be supervised!
Whenever you go swimming you should always be supervised, but you want to be supervised by someone who can save your life so not a two year old or 100 year old you’d want someone who is a powerful swimmer, knows heaps about water safety and is in the range of 16 (could be 14,15) to 70 (could be older but have to be able to swim well.)
Plan your trip!
Make sure you have planned your trip before you go somewhere that is in water. You have to remember to check the weather forecast before you go.
Be prepared!
Be prepared for anything in the water, you have to have lots of food and water in case of emergencies. Also you should have A first aid kit, insect repellent, sunblock and a warm fleece just in case!