If you're an "out of the box" thinker, or when the relationships you're charting aren't as straightforward as you'd like, these wheel diagram graphic organizers are a great tool! You can use these to separate variables into broad categories before trying to pin them down any further. As you refine the characteristics of the relationships, you can add more spokes, until you have all of the categories and divisions you need.
There's a reason Facebook gives you an "It's Complicated" option. Sometimes relationships don't fit into neat little boxes. If that's the case, use these templates.