Clear up your stuff
Now's the time to start thinking about what you're going to take with you and what you're going to leave at home.
You may also need to book a storage unit if you've got furniture or other chunky belongings with no place to live while you're living in the UK or London.
Redirect your mail
If someone you know will be staying at your home address while you're in London, buy them a bottle of wine and sweet-talk them into keeping an eye on your mail. Unfortunately, though, a bottle of wine won't quite do it for either the New Zealand Post or Australia Post, whose services you may need to engage if you're leaving your home behind. Both can redirect your mail to another address, but you'll need to pay them and give them at least three days' notice.
Start packing
Travel as light as possible, and be sure to check your luggage allowance with your airline before flying. Make a packing list, sure, but don't worry too much about forgetting something: you can almost certainly replace it in the UK. Apart from your passport, that is.
Say your goodbyes
It's too late to back out now.
Before you leave
> As soon as you decide to go
> Two months to go
> Six weeks to go
> One month to go
> Two weeks to go
> One week to go