Recently after dumping all my thoughts on a piece of paper, I was left with a few items I wasn't able to process in my planner - at least not at the time. I wrote them all down on one of my weekly pages, but then the week passed and I didn't get to all of those items.
Most of these items are things that need attending to in the very near future but I can't put a date on them. I don't want to rewrite the list over and over (especially since I sometimes procrastinate - I know I am the only one who does that) so I cut a post-it down to match one of the columns on my weekly page and wrote down the 5 items. My main purpose is to keep those things in front of me so I will look at it everyday.