First, study the hype-curve for all it's worth.
(http://static7.userland.com/oracle/gems/reynolds/hypecycle.png)
There, that should be about all it's worth -- useful, but no longer a new idea.
Now here's the formula:
The theme is probably obvious, but I'll spell it out: technology pundits always challenge the late majority. When they don't believe, you believe; when they get excited, you sober up; when they become disillusioned, you cheer them up. Lather, rinse, repeat.
Want a great recent example? Check this out:
I read it a while back and it left a bad vibe. It's not that the author doesn't make some fine points, he does. I suffered because it was so obviously a book from a marketing minded guy with an agenda unrelated to the point of the book. I don't believe for a minute he buys his own argument -- not a minute. I know he knows that what has value will survive and what does not will not. "Culture" is not at risk -- that is absurd, and frankly, not even possible. I am confident he was trying, and for a time succeeded, in capturing the anti-web20 chair at PMU (Popular Mindshare University -- which I hope does not actually exist). I admit, part of me wished I'd thought of it.
I've not heard much about him lately, so I suspect he couldn't sustain it. Why? Because he's being joined by so many other capable "mature-risk-adverse-guys-with-the-historical-perspectives". And, of course, they're just waiting for everyone to join in that chorus/dirge, and then they'll change their tune again.
Now, go forth aspiring technology pundit.
Epilogue: The unreasonable men make bets and move early; the fearful change direction in the downturn, or in the face of any apparent challenge; and the real explorers press on up the "slope of enlightenment". Fortunes come and go. Good technology pundits profit at every phase.