Just a little something I discovered by accident and can make life a lot easier. When you've got a browse to file dialog open in the Flash IDE you can just type in a URL and it will load that in for you.
In the past when working with the XMLConnector component I would download a copy of the XML file I'm using just to load in the schema in the Component Inspector. Rather than doing that you can have it point to an online resource.
The same goes for any file browse dialog: open, import, run command etc.
Easy, no? :)