When planning for your trek you will need to be strategic. What and how to pack are your key consideration. Start with a list and then lay everything out that you need to pack. Making your backpack comfortable for those long days on the road is key so the following tips are about maximizing space and keeping your pack comfortable with proper weight distribution.
Roll your clothes
Separate your money
Take a photocopy of your passport
Keeping a photocopy of your passport in a safe place in your pack could come in handy if your actual passport is lost or stolen. If you go into a consulate with the photocopy it is a lot easier to verify your identity and expedite a replacement.
Pack items you will need for camp or hostel at the bottom of your pack
Pack those items you will not need often at the bottom. When you are at your hostel you will have the space to fully unpack your backpack and pack it all back up again. You will not want to do that when you are on your travels.
Bring toilet paper
Toilet paper is a luxury that we often take for granted. It can be handy to have your own 3-ply supply with you, as the paper supplied may not be of the same standards as you are used to, and even in some parts of the world you may not have toilet paper supplied in public bathrooms.
Have a travel book and phrase book
A travel book and phrase book are very handy resources that you will refer to often. You will likely want to read through these before you set out on your trip, but you will also find maps and quick stock phrases very handy.
Being able to repair small tears with clothes or sew on a button that has come loose is great when you are on the road. Also, you will likely have a few scenarios where a safety pin may come in handy.
Distribute weight evenly and help yourself keep a good centre of gravity. Pack heavy items near the bottom and centre of the backpack and pack things like socks and underwear on the outside where room permits.
Keep a waterproof bag for dirty clothes that need to be washed in your bag so that you can easily keep worn clothes separate until you can do laundry. Also, if you will be doing any swimming then strongly consider a second bag for wet clothes if you are unable to dry them before packing up.