Gustavo Gil A guide to hunting long-lived particles at the LHC Simon Knapen, Steven Lowette Hide abstract | Show figures | Show BibTeX | Show discussion | View PDF | 2212.03883v1 This article is a pedagogical review to searches for long-lived particles at the LHC, primarily aimed at experimentalists and theorists seeking to initiate and/or deepen their research in this field. We cover general theory priors and example models, the main experimental techniques for long-lived particles and some of the subtleties involved with both estimating signal efficiencies and background rates. Authors' comments: 31 pages, 5 figures. Invited review for Annual Reviews Nuclear Particle Science 2023