When you have a short window to study but a large pile of material, the most common problem is not the volume itself but the difficulty of knowing where to stop. A chapter, a video series, or a set of notes can feel like one continuous block, and if you treat it that way, you either skip it entirely or start and never finish. The practical move is to split the material into units that have a visible endpoint you can reach in the time you actually have, whether that is fifteen minutes or an hour.
A useful way to define a small task is to tie it to something you can check when you are done. Instead of "read the section on X," try "read the section on X and write down three things it says that I did not already know." The checking step does not need to be elaborate; a short note, a marked page, or a quick self-question is enough. What matters is that you can look at the task afterward and say whether you completed it or not, which keeps the list honest rather than letting half-finished items blur into done.
Organizing the materials themselves saves time that would otherwise go to searching or re-reading. If your sources are spread across files, bookmarks, printed pages, and app screenshots, gather them into one place before you start breaking them into tasks. A single folder, a single notebook, or even a single desk drawer works as long as you know where to look. When you split the material into tasks, note which source each task belongs to so you do not have to hunt for it again later.
When you cannot cover everything, the order of tasks matters more than the number of them. One straightforward approach is to put the tasks you need most soon at the top and leave the rest below. If two tasks depend on each other, do the one that the other builds on first. You can also mark tasks that are only useful if time allows, so you know which ones to drop without guilt when the window closes. The list is a tool for deciding, not a promise that everything on it will get done.