Live in the Future
The recipe PG keeps returning to comes from a line about Pier Oliner's observation, compressed to: live in the future, then build what's missing. People at the leading edge of a fast-changing field don't strain to see the future. They're standing in it, and gaps in it look like obvious annoyances.
Zuckerberg built Facebook partly because he lived online in a way most people in 2004 didn't yet. To him, connecting people through software wasn't a vision. It was Tuesday.
You become the kind of person ideas happen to by working at some leading edge, usually of a technology, either as a builder or a power user. Then ideas stop being something you hunt and start being something you trip over.
“Live in the future, then build what's missing.”
Key idea
Get to the leading edge of something that's changing fast. From there, good startup ideas look like obvious gaps, not visions.