The article mentions using a disposable VM to view email attachments but considering how much malware is delivered through the web I like to keep my web activity highly comparmentalized by default. The trick is to configure the browser and set your bookmarks etc first in the disposable app vm template. You can even have some accounts pre logged in, ideally using Firefox's container tab system for extra security.
For a more advanced setup: I have one dispvm template for general web surfing and another for my social activity, with container tabs and live logins for various social platforms, and then a third dispvm template where I'm logged in to some things I care more about like Google Docs. Then all my really sensitive stuff is in a fourth, non disposable vm where I only use it for things like bank, mutual fund, 401k, credit cards, etc (all in container tabs for extra security). No web surfing ever in that vm.
This cannot be emphasized enough. :)