If you look at my Study Log, which was based on @trunklayer, you’ll see I’m pretty minimalist or functionalist about the whole thing.
I divided it into categories. Under each, I simply bullet point the study sources. I expand the list as I find new resources that interest me. The only absolute is to do all my reviews every day. That absolute is driven by my current stage of Japanese study: I’m getting back into it, so I want to focus on vocabulary reacquisition. Meanwhile, I continue to advance my French daily with reading. So given this arrangement, I’m comfortable with the limited daily minimum. But as you can see, I often do additional study.
I update it throughout the day, simply placing a checkmark when I complete an item. And I allow myself a comment space either to comment on the study itself or on something in my life that might be impacting my study. It’s a good practice to verbalize the factors that can impact study, and perhaps reflect on them for the future.