The one that leaps straight to mind is from William Gibson's Neuromancer: "The sky above the port was the colour of television, tuned to a dead channel."
It's interesting also as a historical artefact - my kids probably wouldn't understand that it means a dirty, ash-filled mess. Due to digital delivery, these days a television tuned to a dead channel shows a bright, cheerful blue.
Comes from Edward Bulwer-Lytton's 1830 novel Paul Clifford. Here is the whole opening sentence:
It was a dark and stormy night; the rain fell in torrents — except at occasional intervals, when it was checked by a violent gust of wind which swept up the streets (for it is in London that our scene lies), rattling along the housetops, and fiercely agitating the scanty flame of the lamps that struggled against the darkness.
This is a very interesting question. Most times when I buy books I'd like to keep with me for a long long time, the 1st and last lines of a book are what impact my decision to buy because they give me a hint of the content within.
The best I remember is Stephen Hawking's "A Brief History of Time". It's first line is "We go about our daily lives understanding almost nothing about the world." and the last line is "If we find the answer to that, it would be the ultimate triumph of human reason -- for then we would know the mind of God"