Final answer:
Prioritizing tasks in order of importance is integral to planning and could be aligned with Step 1 in establishing an effective assignment notebook.
Step-by-step explanation:
Putting tasks in order of importance is a crucial step in creating an effective assignment notebook. This task falls under organizational skills, which are not explicitly outlined in a single step but are intrinsic to the whole process of planning and completing assignments. In the steps provided as reference, this activity of prioritizing could be likened to planning the problem in Step 1, where writing and balancing a chemical equation requires identifying the key components before proceeding. Since planning involves identifying necessary actions and organizing them by importance, it can be considered Step 1 in this context.