1. Install Magento, Theme

2. Set up .htaccess

3. Install SMTP Pro

Extension: http://www.magentocommerce.com/magento-connect/aschroder-com-smtp-pro-email-free-and-easy-magento-emailing-for-smtp-gmail-or-google-apps-email.html

4. Install Fontis Australia Extension

Extension: http://www.magentocommerce.com/magento-connect/fontis-australia.html

5. Tax Configuration

– Go to System -> Sales -> Tax

Tax Classes
Tax Class for Shipping: Shipping

Calculation Settings
Tax Calculation Method Based On: Total
Tax Calculation Based On: Shipping Address
Catalog Prices: Including Tax
Shipping Prices: Including Tax
Apply Customer Tax: After Discount
Apply Discount On Prices: Including Tax
Apply Tax On: Custom price if available

Default Tax Destination Calculation
Default Country: Australia
Default State: *
Default Post Code: *

Price Display Settings
Display Product Prices In Catalog: Including Tax
Display Shipping Prices: Including Tax

Shopping Cart Display Settings
Display Prices: Including Tax
Display Subtotal: Including Tax
Display Shipping Amount: Including Tax
Include Tax In Grand Total: No
Display Full Tax Summary: No
Display Zero Tax Subtotal: No

Orders, Invoices, Credit Memos Display Settings
Display Prices: Including Tax
Display Subtotal: Including Tax
Display Shipping Amount: Including Tax
Include Tax In Grand Total: No
Display Full Tax Summary: No
Display Zero Tax Subtotal: No

Fixed Product Taxes
Enable FPT: No
Display Prices In Product Lists: Including FPT only
Display Prices On Product View Page: Including FPT only
Display Prices In Sales Modules: Including FPT only
Display Prices In Emails: Including FPT only
Apply Discounts To FPT: No
Apply Tax To FPT: No
Include FPT In Subtotal: No

6. Paypal Configuration

6.1. To show message on the Paypal payment method.

– /app/code/core/Mage/Paypal/Block/Express/Form.php

protected function _construct()
{
       $result = parent::_construct();
       $this->setRedirectMessage(Mage::helper('paypal')->__('You will be redirected to the PayPal website.<br /><strong style="color:blue">XXX is the company operating YYY. You will process the payment with XXX.</strong>'));
       return $result;
}

7. Auspost Configuration

8. eBay-Magento Integration

http://www.magentocommerce.com/magento-connect/ebay-magento-integration-order-import-and-stock-level-synchronization-also-supports-amazon-rakuten-and-play-com.html

9. Set up Google Sitemap

http://www.magentocommerce.com/wiki/3_-_store_setup_and_management/seo/creating_google_sitemaps_for_magento_sites

10. Do some optimization

https://www.goivvy.com/blog/speed-up-magento

Thanks to @Antonella Morales

11. Install & Configure Creare SEO

http://www.magentocommerce.com/magento-connect/creare-seo.html

 12. Install Beetailer Facebook Shop

http://www.magentocommerce.com/magento-connect/beetailer-social-commerce-platform.html

 13. Install Facebook and Twitter Widget

http://www.magentocommerce.com/magento-connect/facebook-and-twitter-widget-comment-and-share-your-products.html

 14. Install Fooman Speedster

http://www.magentocommerce.com/magento-connect/fooman-speedster.html

Trouble Shooting…

– Item (Mage_Catalog_Model_Product) with the same id “292” already exist” 

Reference: http://www.magentocommerce.com/boards%20/viewthread/45843/#t451260

Edit : /www/app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php
Line: 256

Replace:
return parent::addItem($object);

With:
try { return parent::addItem($object); } catch (Exception $ex) { }

To be updated…