I just need a way to both have a thinking note taking system, while also not letting todo items get lost. My best thinking note system is just a notepad for ha

I just need a way to both have a thinking note taking system, while also not letting todo items get lost. My best thinking note system is just a notepad for handwriting, but todo items disappear very quickly in there, which is not ideal (but sometimes it's good, that things naturally slide out if they are less important.)