NOTE: TO FULLY ENJOY THIS ANIME, WATCH IN CHRONOLOGICAL ORDER! Doesnt apply for Second Season (S2)

Genres: comedy, mystery, psychological, science fiction, slice of life, supernatural
Themes: Harem, otaku, school 
Age rating: Teenagers (May contain bloody violence, bad language, nudity)
Plot Summary: On the first day of high school a beautiful girl named Haruhi Suzumiya introduces herself as having "no interest in ordinary humans". She asks for any aliens, time travelers, sliders or espers to join her. Watching her weird behaviour is Kyon who sits in front of Haruhi and is the only person who talks to her. When Kyon comments about Haruhi's joining every club in school and then quitting he unwittingly gives Haruhi an idea to start her own after school club. Thereafter Kyon and several others find themselves dragged, literally, into the Save our world by Overloading it with fun Suzumiya Haruhi's Brigade (the S.O.S. Brigade for short).

1. Mikuru Asahina's Adventure Episode 00
Chronologically, this is the 11th episode.
2. The Melancholy of Haruhi Suzumiya I
Chronologically, this is the 1st episode
3. The Melancholy of Haruhi Suzumiya II
Chronologically, this is the 2nd episode
4. The Boredom of Haruhi Suzumiya
Chronologically, this is the 7th episode
5. The Melancholy of Haruhi Suzumiya III
Chronologically, this is the 3rd episode
6. Remote Island Syndrome (Part 1)
Chronologically, this is the 9th episode
7. Mysterique Sign
Chronologically, this is the 8th episode
8. Remote Island Syndrome (Part 2)
Chronologically, this is the 10th episode
9. Someday In The Rain
Chronologically, this is the 14th episode
10. The Melancholy of Haruhi Suzumiya IV
Chronologically, this is the 4th episode
11. The Day Of Sagittarius
Chronologically, this is the 13th episode
12. Live Alive
Chronologically, this is the 12th episode
13. The Melancholy of Haruhi Suzumiya V
Chronologically, this is the 5th episode
14. The Melancholy of Haruhi Suzumiya VI
Chronologically, this is the 6th episode 

So, to watch it in chronologial order, you'd have to watch the episodes in this order:
2, 3, 5, 10, 13, 14, 4, 7, 6, 8, 1, 12, 11, 9.

It is recommended that you watch it in that order.
But you don't have to of course