Warning: This technique requires a significant amount of free time, a reliable snack supply, and a willingness to sacrifice all sense of time and responsibility.
Start with a popular show, preferably something with a large number of episodes. Then, clear your schedule for the entire day. Set up a comfortable viewing area, complete with a large screen, a plush couch, and a mini-fridge full of snacks.
Begin watching episode 1, and continue watching episode 2, 3, 4, and so on. Do not stop until you've watched the entire series. Repeat this process for other popular TV shows, gradually increasing the number of episodes per show.