I'm not sure a lot of people know this, so I thought I would share
If you are shipping or receiving items via USPS or Canada Post, you can track your package on BOTH websites.. You will usually get better tracking info on the Website of the country that it is supposed to be delivered in (once it enters that country)..
ie. I sent a package to the US via Canada Post. I check the Canada Post website for the tracking info and it says it has left the country..
I then went to the USPS website with my tracking number.. and it shows that it's been delivered today
This works the other way around as well...
I'm not sure if this works for other countries, but give it a try.