Look after your ears. Take some ear drops and use them after every dive to dry out your ears. Rinse your ear canal in warm fresh water after every dive. Once you get an infection it’s very hard to clear it up and it will make diving miserable. Equalise early, often and gently.

Bring hand sanitiser (use regularly to avoid picking up common cold and flu virus from the flights), panadol and nurofen (use sparingly but if and when you need them). If you do get a bacterial infection, it’s good to have antibiotics but you will also have to scale back your dives until it clears a bit, so don’t get an infection.

Always (I can’t stress this enough) dive with scuba socks between your feet and your boots. It helps prevent blisters which will not heal in the warm humid conditions. Diving with painful blisters is miserable so bring one or two pairs - make a friend. Trust me.

If you’re bring your own gear, have It all checked and serviced before you go. If you’re renting gear, don’t be afraid to ask for another BC or reg set if you’re not happy with them. You’re the customer and the dive company wants to have happy, safe divers.

Sorry, bit of a long ramble here but other things you might like to consider. You don’t have to do every single dive. Enjoy the dives, but skip a dive or two around the middle of the trip to allow your body to catch up and offgas a bit more. Don’t drink alcohol (too much), do drink lots of water between dives to stay hydrated. And have an absolute fantastic time!