When a new adventure is placed before you, you try to prepare for it. I am fully convinced that no matter how much you prepare for something that there will be another thing that comes up that you don't expect.
Even though there are things that we don't expect we need to remember that God ALWAYS has a plan. He ALWAYS knows what is going to happen and when it is going to happen. His masterful plan is wonderful. He can see the FULL picture where I can only see a snapshot.
When I am faced with trying situations and am trying to prepare for things I hope that I can remember that God's plan is always the best plan.