Paper to write on can be found in a variety of places, including office supply stores, stationary stores, craft stores, and online. The type of paper to use depends on the type of writing that needs to be done. For example, if you are writing a formal document, then a thicker, high-quality paper should be used. If you are writing a creative piece, then lighter-weight paper may be more suitable. Additionally, some types of paper are better suited for certain types of writing, such as sketch paper for drawing and watercolor paper for painting.