Start by creating a detailed inventory: write down series titles, season totals, episode counts, and average episode length. Example templates: network drama – ~22 eps/season × ~42 min; premium streaming – about 8–10 episodes at 50–60 minutes; miniseries – 3 seasons of 10 episodes at 45 minutes equals 22.5 hours. Put totals in a spreadsheet column: episode count, runtime per episode, total minutes, and total hours. ...