I basically have two rules for what I carry: 1) if I use it more than once a month, I carry it and 2) unless it takes up too much space.
The only supplies that I have, other than a pen and a highlighter, fit in a small zipper pouch.
I keep a few paperclips, some small magnetic page markers, and a reader arrow bookmark. Honestly, I rarely use these things in my planner. Instead, I use them when I am substitute teaching or processing receipts, to mark the lesson plan or divide up receipts into categories.
I have weekly chore stickers, though I am about to get rid of those in favor of weekly, custom-made post-it notes (which are easier to move around).
I have post-it tabs, perfect for labeling projects or notes.
There are also sticky notes. I use these occasionally in my planner.
Finally, I have stamps.
In the very back, serving as a decoration, a spiritual uplift, and an as needed bookmark, a custom bookmark made by my award-winning quilter friend.
That's all I bring with me. I have lots of other stuff at home, but it would be silly to carry it all around.
What do you carry? Too much? Too little?
Come talk about it at the Giftie Etcetera Facebook Group.