Life has flux, that is one constant thing about life. If you have it planned out perfectly, then something will be thrown in to force you to change your approach. Life is a living breathing thing, it is not static.
A more effective way of grouping your tasks is to use a tiered method. I recommend having a loose list of things that need to be done, and move them over to your daily list as you find your self with more time. If you don't find yourself with additional time, you should take a look at how to close your open loops.
The approach that I use in my personal and professional life is 3 tiered. First, I have a calendar of the hard lines that are required of me that day. These include meetings, appointments, anything that is scheduled. The scheduled part of my day make up no more than 40% of my hours awake. Second, I track my soft lines in a list of the tasks that need to be completed in the near future, these are set as upcoming. The upcoming threshold I use is a task that needs to be completed within 30 days. Lastly, I have a list of float items that I want to get to. I typically leave these items to fill the gaps, when I am early to an appointment, or taking a break in my Pomodoro sprint. These float items are things such as reading an article, or catching up on email or reading the book I'm working on.
Here are the 3 tiers
- Hard lines in Calendar
- Soft lines in Upcoming Task List
- Float in want To-Do list.
I hope this helps make you more effective. To your success.