I missed this thread earlier - saw it and read it days ago, meant to comment, but it slipped my mind until I rediscovered it just now. (Maybe I should have put it on a schedule!)
I was never one for a schedule as such, but I did learn - from "secular" work especially once I got promotion to a team lead role, years before becoming a JW - to do some sort of scheduling or time allocation, though it's usually just jotting down a breakdown of time in a day/week eg:
Mon AM - do X
Tue PM before 5 - do Y
... and so on.
Specific enough to make sure I didn't miss the essentials, but flexible enough to adjust for the unexpected.
One thing I definitely NEVER did was set "spiritual goals". I never saw the point, especially as most of the "goals" described tended to be things like "go to Bethel" or "serve where the need is greater" and so on, which were more about serving the wants of the organisation than really growing as a person.
Meeting preparation I'd just fit in as and when, and as time went by it became easier as I knew the points and scriptures that would keep coming up and the meetings got dumbed down, to the point where I just skimmed the material before the meeting - or even an item or two ahead while at the meeting itself. I'd spend a bit more time preparing if I was the one doing the item, but they were all usually quite simplistic anyway, and I was never an elder expected to give a public talk or convention item. One of those 15 minute talks or 20 minute Q&A items from the old Kingdom Ministry was about my limit.
The things I thought really spiritually important - growing closer to God, better understanding the Bible, developing Christian "qualities" - perhaps strangely didn't seem to me to be things you could set a specific "goal" for. I saw them as continuous parts of your "journey" or way of life.
For example, it seems absurd to me to say: "This week I'm setting a goal to work on humility" - as if you're just going to train a bit then "perfect" that quality and move on to the next one. Yet that's exactly what the JW org recommends to the R&F, as if you can just neatly allocate time like that.
I do agree with StephaneLaliberte that the one skill I benefitted by from JW "training" was public speaking in front of a crowd. It came in handy in the workplace once I had to start giving presentations to groups of 100+ in an auditorium. The nerves were still there, but I knew how to control them and get on with what I had prepared, and was also better prepared to handle Q&As, ad lib or deal with distractions when the need arose.