Parcels need to be wrapped in such a way that they look like very dull business post - if it looks too inviting then someone will open it.

Parcels need to be be wrapped so that they can withstand, damp and rats - i.e. put everything inside a plastic bag or two before you wrap it up and then seal it with lots of tape.

On the customs sticker [if you have one] do not write that the contents are worth 100 dollars - this makes it too inviting, and we sometimes have to pay tax on the amount as well. Best is to say that the value is "nil" - from an insurance point of view it is!