After going through the hassle of shipping the Review These PIF up to pyrofish in Alberta, I thought I'd put together a couple tips to make your life easier if you have to ship stuff to Canada...

#1 Get the recipient's phone number (I think it's in case there's a problem on that side of the border)

#2 Prepare to Declare (I said it was a gift of cigars with a low value)

#3 Pack cigars in a small USPS box

#4 Drop the box into a Global Priority Tyvek Envelope

#5 Stick a Customs Form Envelope to the back

#5 Do the online order thing and place the Post Office Copy and Customs Declaration into the Customs Form Envelope

The supplies are free, so they're not a bad thing to have around. Those links are:
Global Priority Tyvek Envelope
Customs Form Envelope

I assume shipping to the UK and Europe would be a similar deal, yes?