Publications of all types require more time and planning than presentations, but can strongly enhance your CV.
The most common types of publications authored by residents and junior faculty:
All publication types require a basic or expanded literature search and compilation of information. After the literature search is complete, information can be reviewed and an outline drawn up. With due diligence to obtaining and organizing materials, writing should not take that long. Authors must then find a suitable journal and survive the give and take process of editing after peer review.
Resources from AAMC: Fostering Scholarship in Medical Education: Resources for Authors and Reviewers