[whpalmer4]

You confused me with the other question, it appears.

Views come in two flavors: project, and context. A project mode view shows you projects and the enclosed actions, in the order you would work on them if they are sequential projects. A context mode view shows you lists of actions, arranged in an order that may have nothing to do with projects.

Perspectives are views with settings of your choosing that you've established. A perspective can show you the entire library of projects and tasks, or a very narrow subset. You could have a perspective that shows you all of the actions which are due in the next few days, or all of the actions in projects related to business #1, or all the projects that have the string "monkey brains" in their name.

Contexts aren't really groupings of items you do, necessarily, but rather a constraint, such as a location, or a tool, or a colleague. You might have a context that represents calls -- the tool there is your telephone, and you can't work on the tasks in the calls context without a telephone of some sort. You might have a context that represents your office at business #1, for tasks that can only be done in the office at business #1. One popular practice is to have an Agenda context with subcontexts for people you frequently interact with. You might have Agenda:Business #1:Accountant, and tasks requiring the presence of business #1's accountant would go there. Agenda:wife could hold tasks where your wife's presence is needed. The Agenda contexts can also be used to keep track of items you are waiting on from someone. If you run into the accountant, you can pull up the Agenda context for the accountant and see all of the things you are waiting on, or wanted to do with the accountant.

Some people will immediately say "but I need to put this task in more than one context". You can't do that right now, but in practice this usually turns out to be more of a theoretical issue than a practical one. I just pick the most restrictive context.

Once you've settled on your contexts, you can build up a set of perspectives that will allow you to see just the work relating to business #3, or home improvement projects, or tasks you can do while stuck in the airport waiting for your next flight.