Introduction to updating
There are many ways to approach updating your game. Some can be very use-friendly, such as updaters that will go through and get the newest version of every file for you without you having to touch a single key, while others make you go to their website and download all the patch files, in order.
In the long run, ease-of-use is the most important thing for updating. Speed is quite important, too, but you never want to make it harder for someone to get updated just for making the process faster (if you know what you are doing) or use less bandwidth.