Here is my to-do list, photo taken this past Monday morning:
As you've noticed, on Monday I was still working on things from the previous Wednesday. As you've also noticed, Thursday is not on the to-do list. That is because I finished everything I wanted to do on Thursday! As I finish things, instead of crossing them off, I delete them. Trust me, it's much more satisfying. And being able to delete a whole day is really the best feeling there is.
I also usually include things like "shower" and "eat dinner" on my list because (A) those things do take up time in the day and (B) I really like being able to delete things from my list. The reason you don't see any of those on the list above is because they actually get done, so they're always deleted from the list. You're not gonna see "eat dinner" from Wednesday still on the list on Monday - that would mean I hadn't eaten dinner in 6 days! Now that would just be ridiculous.