>>113531here's the chronological order (however recommend to watch the 1 ep before anything)
(S1) 2,3,5,10,13,14,4) - S2 (1) - S1 (7,6,8) - S2 (2,3,4,5,6,7,8,9,10,11,12,13,14) -> S1 (1,12,11,9) + The Disappearance of Haruhi Suzumiya + (-maybe-) The Disappearance of Nagato Yuki-chan (spin-off) + Haruhi-chan (ONA)
i have watched it both ways and i recommend the regular non-chronological order S1+S2+Movie (despise some irregularities it was more enjoyable in my opinion since the chronological is a complete mess).