By going to apple.com and selecting the MBP model and clicking on the buy button and place your [pre]order.
By going to apple.com and selecting the MBP model and clicking on the buy button and place your [pre]order.
Since Apple has not even announced any updates, there is nothing to pre-order. You will need to wait until Apple provides the date and time of when you can place a pre-order. Since these are pre-orders, your only choice is to buy them through apple and not any other retailer.