What precautions should you take to make accurate predictions?

You'll do better if you think of every possible outcome, and make preparations ahead of time to avoid/fix it. Most people think of the best outcome and avoid other possibilities. This leads them to depression when they don't get what they want!

So your precautions should be set according to every situation that may happen. Your mind will be ready, and you KNOW you can take on anything that might come your way.