It’s very important to have copies of such documents, should you lose them and then require emergency assistance. To cover all eventualities, scan the documents and email them to yourself, then save the email somewhere where it is easily accessible. I would also recommend taking photos of them on your phone and saving them to your favorites. It is also a good idea to make some photocopies of these documents. Keep a paper copy for yourself in your important documents folder and leave copies with your next of kin. That way, if you need help and can’t get hold of your copies for any reason, they can act on your behalf quickly with all the necessary information.
It's tempting to walk into one of the travel shops and just go bananas. You could spend thousands in there, picking up things like special travel shirts with breathable material, compression sacks, wire mesh thingys to wrap around your backpack, money belts, karabiners, hiking shoes… But you don't need any of it. Wear clothes you're comfortable wearing. And using a money belt is like carrying around a sign saying "rob me".
You need insurance. Even if you're just planning to lie around in a resort for a week. If you're in an accident, or you get sick, or your bags go missing, or any one of a million other mishaps occur while you're travelling, you'll be extremely pleased you spent that small amount on an insurance policy. (Read: The insurance mistake travellers keep making)
Invest in Luggage: After you figure out if you will be a “carry-on only” or “check only” type of business traveler, invest in a lightweight, durable piece of luggage that has a warranty. The same goes for a laptop bag. Whether you choose a shoulder bag or backpack, make sure it has a lot of padding and distributes weight evenly. You do not want your luggage breaking in the middle of an airport.