This guide is for the litigator who has to take a deposition in a federal civil case and wants to take it well. It maps the machinery of Federal Rule of Civil Procedure 30—the one-day, seven-hour clock, the presumptive ten-deposition cap, the officer and oath requirements, and the moments when leave of court is required—then works through noticing party witnesses, compelling nonparties under Rule 45, and the special discipline of organizational testimony under Rule 30(b)(6) after the 2020 meet-and-confer amendment. It builds a working method for questioning: funneling, looping, locking in admissions, and the commit-and-confront impeachment sequence, with attention to exhibits, experts, hybrid witnesses, apex executives, and remote proceedings. A dedicated part covers the deposition that goes wrong—the no-show, the Fifth Amendment invocation, the witness who lies, the emergency that ends the day. It closes by showing how a transcript becomes evidence under Rule 32 and Federal Rule of Evidence 801(d)(2) at summary judgment and trial. Throughout, primary authority is cited and every doctrine is illustrated with a worked hypothetical a judge, a lawyer, and a layperson can all follow.