My only addition i sto think of what is most likely to go wrong, e.g. your are going to be late returning, or falling and hurting yourself, and develop a plan on how to deal with that emergency. If you have thought about how to deal with problems befor they happen you have an idea of how to work through them, thus lessening the stress of the situation. Also it may be like carrying an umbrella and it doesn't rain, if youplan for it it won't happen.