I've gotten a lot of productivity out of todo lists.

I've tried Cal Newport's calendaring system as well, which is more or less a bullet journal + timeline and I thought it was somewhat helpful, but in the end it was too tedious.

The thing that doesn't work for me is that If I don't finish something within a timeframe, its not worth context switching. Other times it made no sense to take on a task at a specific time.

Sometimes its just better to have a simple list and wing the rest of it. Don't overcomplicate your life if you don't have to.