If you ever talk to someone who is bored then they’re bound to be a little upset about it. They might even whine or maybe they’ll just stare blankly at you. Maybe they’ll ask you if you know what you want to do, 
But boredom isn’t always something to be upset about or make a fuss about. It’s something to be embraced and to learn from. Boredom can certainly be an unpleasant sensation but it doesn’t needed to be treated with hostility or like it’s always the enemy of functionality. There’s a difference between temporary and situational boredom and long-term, sustained and emotional boredom which may stem from certain things in your life. The former can often be rectified while the latter may be more serious and difficult to grapple with.
In general however, boredom as most people experience isn’t as big of an ordeal as most people act like it is. It can be great chance to strike out and do something new. It can be a way to just think to yourself for a while and reflect on what you have done. Thinking about what you’ve already done might be a great way to keep going once you’re out of your stupor or however you experience boredom. That way you can say something like, “Well I did X, Y and Z yesterday but still needed to do A, B and C so I guess that’s what I need to do now!”.
This isn’t how it always works since not everyone uses a to-do list (though I do and I recommend it!) and not everyone is very easily organized. There’s also the issue of boredom mixed with depression which might make, “just do it” a somewhat worthless bit of advice. Add to that that some people have such an issue with organization skills that organizing the to-do list to begin with and organizing that on a daily basis would be a struggle for them. And maybe such a struggle just wouldn’t be worth their time and so they’re left disorganized. That’s fair enough but even without a to-do list it can be a good idea to try to just focus on your goals or past actions.