The window switcher (found on top-left of Orion toolbar) is a great way to switch contexts. I personally use one window for "personal" unordered stuff, and then one window per project.
An important missing feature for me is being able to reorder windows here:

and here:

I want to be able to always have the personal window on top of the list (accessible by Cmd-Opt-1). This is a case in screenshots above, but only by accident :-)