A bullet journal (sometimes known as a BuJo) is a method of personal organization developed by designer Ryder Carroll. The system organizes scheduling, reminders, to-do lists, brainstorming, and other organizational tasks into a single notebook. The name "bullet journal" comes from the use of abbreviated bullet points to log information ,but it also partially comes from the use of dot journals, which are gridded using dots rather than lines. First shared with the public in 2013, it has become a popular method, garnering significant attention on Kickstarter, Instagram, Facebook, YouTube, and Pinterest.

Bullet journals are usually handwritten, and kept in a single notebook. The core tools of a bullet journal are:

an index，rapid logging，logs，collections，migration

The index functions like the index to a book, or a table of contents, pointing to where information on different topics is located.

Rapid logging uses a system of symbols (e.g. dashes, asterisks, circles, etc.) to simplify, abbreviate and organize information. These symbols can be explained in a key, typically located in the front of the journal. Information can be organized into tasks, events, notes, and other categories.

Logs are to-do lists, organized on different time-scales, including daily, weekly, monthly, and future logs. Logs are often called spreads, since they typically spread across two adjacent pages.

Collections make up the bulk of a bullet journal, and organize information by content - these can be logs, lists, trackers, etc. Other popular collections include habit and mood trackers, fitness or diet trackers, list of books to read, restaurants to try, etc.

Described as the "cornerstone" of bullet journaling,migration is the practice of periodically updating lists to new lists, such as carrying over unfinished tasks from one month's log to the next. This helps users stay organized, productive, and on task by allowing them to prioritize what things need to get done, and what can be placed on hold. Migration can also refer to the process of moving into a new notebook.