Hey,
In 3 weeks I'm lodging my partner visa too. I'm just waiting on another stat dec and my UK police check.
DO NOT staple it!! Just pile it up. I have put coloured tabs on the top showing proof of ID, Joint finances, 47sp, 40sp, proof of de facto, personal statements, stat decs, and so on..
I am going to the post office and registering my post and sending it to:
GPOBOX 9984
SYDNEY, NSW
2001
(depending what state your in)
And you just put your credit card details (preferred payment) in with the application
Hope this helps