Samuel, my reply was mostly directed to this:
My understanding is that if I don't go through all the important things in my life every day literally and systematically, not just randomly reflecting on what I feel like I need at the moment, I will have forgotten something important during the nights and days that pass until my next appointment.
This is the kind of attempt that can easily spiral out of control. Is it enough to review the Confession daily or do I need to review the Catechisms as well? Should I add in the proof texts? Maybe I should include the whole chapter where each proof text occurs to get the context? And maybe I should do that in the original languages? And what if the Westminster Standards overlooked something? Perhaps the 4-volumes of
Reformed Confessions in English Translation will suffice to cover all my bases. Anyway, I'm sure you get the point. It is not necessary to always say (or review) everything. You want to be exposed to the whole of Scriptural teaching, but there is nothing wrong with being exposed to one thing today and another thing tomorrow.
I'm not against system. I think it's good to make sure you are reading the whole of the Bible routinely. I consider it a commendable and helpful practice, for instance, to read a section from the Heidelberg Catechism every Lord's Day. But it's fatally easy in the question of devotional practices to make the Stoic error - to assume we will always be at our best and up to doing as much tomorrow as we did today. It's not the only reason, certainly, but trying to do too much is one of the big reasons that people get discouraged and become inconsistent with their devotional practices; they've made the system so large and intimidating that any lapse is catastrophic.