>>280046189 (OP)While the broadcast order of the original 2006 episodes is really good at introducing you to the characters/setting while still being nonlinear and mysterious, if you want to watch the additional episodes they added in 2009 (which are important to view for context for the movieโand, really, the whole reason you should be watching Haruhi should be in order to get the most out of the movie, which is actually pure 10/10) then you'll have to watch it in chronologically.
Unless you wanna watch it once in broadcast and then a second time chronologically. But I don't know to what degree your time is of value or not.