Definitely the glue and glue sticks. Sometimes, I use those composition notebooks to take notes and save swatch samples in when I'm working on a big project. I use the sheet protectors to save patterns in. Then I keep them in binders categorized by technique. This way, they are ready and 'preserved' when I want them, and not lost somewhere, covered in coffee stains. White erasers can be used to rub away thread when unstitching too. I also use sharpies to mark the plastic sheets I use for applique or to darken patterns when I use a light box.