I don’t decorate my planners. Sometimes I use Filofax or Moleskine stickers to show payday or a dentist appointment for example. But generally I just scribble what I need to know. I throw my pages away after I have finished with them so I feel it is a waste of effort to use stickers or draw on my pages.
These I use in my journal though. I like to denote how I am feeling or put little stars around a good day. I have bought from this seller – KawaiiTokyo on Etsy – before and she is fantastic. She has, in the past, found stencils for me which I have been unable to find myself. For someone who likes personalizing their planner, these would be ideal.