Locks
As a solo backpacker carrying the right locks can be very key. I always carry two padlocks with me, One small one, and one larger or mid-sized one.
The small lock can be used on your daypack to secure the pocket with your passport and other important items as you transfer from the airport or bus station to your hostel.
The small lock can also fit most lockers in hostel dorms.
The mid-sized lock can be used for private rooms. Some hostels don’t have locks on private room, so you will need your own lock to secure the space.