1. Decide
You might want to call a hotel or resort for any reservation.If you happen to decide to use a tent. Try to ask for any information regarding campsite. Prepare the things you will bring during the trip. Backpacking Checklist will come on handy with this. Make sure everything that you will bring is working great. Be sure you make itinerary of your trip and give a copy to your family. So if anything happens and worst comes to worst. They know where to find you.
3. Run-through
Have a run-through on everything. Have you booked your flight? Have you call a hotel or resort for any reservation? Do you need a passport for the trip? Do you have everything that you need to bring for the trip? Have you research anything about the place you want to visit? Such things need to be done before your trip.
4. Enjoy!