This is part of a series of posts starting with Evan's Questions. They make more sense in order.
Bullets, Overlays, Signifiers and Colours
Something that isn't exactly spelled out:
| (migration), - (neglect), ------------ (abandon) and [fill] (completion) are overlays which can be applied to any bullet, not just incomplete tasks.
Okay, let's redo the key:
There's sort of two types of modules, that generally correspond to the past/future dichotomy. The type shown in the first Example Module, is probably a past tracking module full of notes that will never need to be migrated. When the page runs out, you just continue on another page. The second type of module is probably tracking a list of tasks that you want to keep fresh and on one page so you can see them all. So every time you run out of page, instead of just continuing on a new page, you migrate everything from this page, to the next, making a brand new 'instance' of the module, and making the old instance irrelevant. Yet you still might want to find it again, and it's not much trouble to indicate page numbers (this page number thing is called 'threading' and is not my invention).
The Unbroken Line of Migration
I draw a line down the right side of my daily (tasks) log when I've migrated all tasks from it. This means I can see at a glance where I'm up to with migrating tasks. If I'm ill for example, the line will just stop at the day when I stopped being able to cope, then when I'm better, I migrate each day in order and extend the line. This way I never have to look back over lists of tasks I've already gone through.
I do something similar with the calendar. When I've migrated migrated everything from today's calendar cell, I put a line down the left side. So (a) I can clearly see what day it is, and (b) if everything goes bat-shit crazy and I don't look at my calendar for a while, I can see what things have been attended to and which haven't. Just because it's in the calendar in the past, doesn't mean it was actually dealt with.