A breakthrough
I think I hit upon a trick of fusing GTD and DIT in a way that makes sense for me. I shift my DIT daily “will-do” list to a weekly “will-do” list, but keep daily lists. As part of the GTD weekly review, I identify which projects I will work on in the upcoming week, and slot the next actions into the daily list for a day based on what I “think” my schedule is going to be. As the week gets dynamic, I might not finish everything on a daily list, but each morning I reschedule everything that is not yet done, based on how my week is looking now.
I realize this has the potential for getting back into a situation where things always slip and never get done, but they’re still all captured in GTD. It’s really adding a bit of the DIT strategy to whittle down the next actions. It HIGHLY depends on making a good assessment during the weekly review of how much work can be taken on over the next week.