Here are some of our articles about creating your own planner stickers:
https://www.avery.com/articles/design-and-print-your-own-planner-stickers
https://www.avery.com/articles/the-art-of-personal-organization-how-to-decorate-your-planner
https://www.avery.com/articles/7-expert-planner-ideas-to-help-you-be-more-productive
https://www.avery.com/articles/keep-track-of-life-s-little-details