Javi Grillo-Marxuach is probably not a name you're familiar with. If you are then you probably already know which article I'm about to point you to. He was a writer from the very beginning of Lost through the end of season 2. So he was there to lay the foundation for one of the great TV shows of the 2000's, if not one of the best ever. It didn't have the greatest ending but I will defend seasons 1 and 2 as some of the best television ever written.
Anyways, he wrote an epic post, about 17,000 words on what it was like to work in the writers room at the very beginning. If you're at all interested in what that was like or are interested at all in the creative process then I encourage to read it. And if you're a Lost superfan then you have no excuse not too.
I'll admit to not reading the full thing just yet, but here is a slice from the middle (link to full):
As a result, even though JJ and Damon had sold a show about a mysterious tropical island full of polar bears and patrolled by a free-roaming cloud of sentient smoke, we had to continually promise during the show's development, the filming of the pilot, and even well into the first and second season, that -- at most -- our sci-fi would be of a grounded, believable, Michael Crichton-esque stripe that could be proven plausible through extrapolation from hard science.
Of course, that was a blatant and shameless lie told to network and studio executives in the hopes that either blazing success or crashing failure would eventually exonerate us from the responsibility of explaining the scientifically accurate manner in which the man-eating cloud of sentient smoke actually operated. Nevertheless the onus was on us to generate tons of exciting stories that could stand on their own without leaning too hard on genre, and in television there is only one way of doing that: have great characters who are interesting to watch as they solve problems onscreen.
So, while we routinely discussed such genre questions as "what is the island?" We also asked ourselves "Who are these people, why were they on the plane, and why are they interesting company in a desert island?"