I agree that notes aren't really useless even if you know you'll toss them out. I maintain a notebook that I write ideas and sketch solutions in. I don't treat

I agree that notes aren't really useless even if you know you'll toss them out. I maintain a notebook that I write ideas and sketch solutions in. I don't treat it as something I'll revisit more than a month from now. I treat it more as a workspace for sketching out ideas and coming back to them a day or a week later to recall what was in my headspace. Usually I'll commit to a solution one way or another based on my notes and I usually don't revisit them after that. I think if I treated notes as "revisit this later" I'd be a little pickier about what I wrote down to reduce the noise, but that just prevents me from using the notebook for what I want, which is a place to brainstorm and sketch ideas.