You may need some paper, to draw this out, but bear with me. At any given moment, a person can be represented by three interlocking rings or circles. All three meet at one point, and then any given two will intersect by themselves at some point as well. One ring is, solely for aesthetic and explination reasons, larger than the others. That's the basic shape.

There are three rings for the three most basic constructions of time: future, past, and the large ring is the present (which really take up no more metaphysical room than the others, it is just where everything is happening, and so when I draw it, I need more room). As time progresses, these rings cycle, moving along each other.

Where all three intersect, that is the present the person is in. Of course, there is an entire ring for the present, but there is only one situation whee past, present and future join. Call it Now (with the capital). The present ring contains all nows, not as alternatives or alternate universes, but as different situations that are also occurring to the person on the present.

What seperstes Now from all other nows is that the past and future are also there. Based on their life and their goals, the person is in the Now as opposed to any other situation, which all occur within the same time unit. That covers the three-day intersection.

The two-way intersections are different depending on which two rings intersect. For the present and past, the intersection is the 'remembered past'. Basically, the events in the person's mind that lead to the Now, and which are therefore being considered. The present and future intersect at the 'foreseeable future's. In short, the outcome the person predicts will come from the Now. The future and past intersect at the 'predicated now', which is what the person expected, but as life teaches us, is never the exact same as the Now.

The drawing gets a little more complicated here. Each person's 'timeline' is touched by other people's. Here is why I draw the present ring big. For simplicity, I also only draw the arcs of other people's present. These arcs touch the timeline, sometimes once, sometimes twice. Sometimes they follow the same path for a while. While it can't say what type of interaction there was, it does say these two people interacted, and they could be interacting (and really, are interacting) in some now.

Finally, all of this is taking place within the Now of the Universe, which has its own timeline with its own rings. The Universe's Now is big enough to contain all other rings, not just their Nows.

This is the product of way to much time trying to think big thoughts, but my friends enjoy it, and I find it usefull at times. I'd love some feedback, refinements or additions.