In regards to shopping for things featured on my blog:
When I know I am buying quite a few things that are from Japan, I would use a custom purchase service like BringBlingjp.
When I need random bits and pieces that are not worth ems shipping I would use Adambeauty, Alpha Beauty Store and sometimes ichibankao.
To avoid the horrible Australian mark up and lack of product range I would use http://www.priceusa.com.au/ when I need things from USA retailers.
Nordstorm ships to Australia via Borderfree shipping starts at $50 (uses DHL/auspost)
I am not affiliated with any of those services, I'm just a happy customer of their services.