Being on top of my current company, I've been on both ends of job interviews. And having seen all kind of people interviewing and interviewed, it's a politically correct move to "Share all my experiences so that you can learn something"
Anyways, here it is:
1. Never say anything nice about your old employer(s)
You should never highlight any positive points regarding your previous employers. Find and list everything bad that you can. Tell those interviewers what you feel. They'll see this as your precious critical skills.
Plus you also demonstrate your endurance level by working in crappy companies for years.
2. Never say "I need a new challenge"
No. It's a cliche. A good one, but still, a cliche. You don't want the interviewers to summarize the job interview stating "Of 1000 candidates, all need a new challenge in their career".
You want them to include "except one candidate that said he wants us to take the challenge from rapid growth he will bring into our company".
3. Never praise the company you're interviewing for
"I like to work here because this company will be a great platform for me to advance my career path" will only uplift those egomaniacs.
Try this: "You will hire me because I will be a great platform for you to triple your company's bottom-line".
4. Never dress professionally
A pair of jeans and a t-shirt work fine. Why imitate all those cookie-cutter looser in the corporate rate-race when you can have billionaire moguls like the Google brothers and Steve Jobs to follow?
After all, Richard Branson did more for the entire human race than Donald Trump did for the New Yorkers.
5. Never sell yourself short
The ultimate value of yourself derives from the demand and supply equation. Never outstrip their demand for your service by supplying too much eagerness- or you'll risk being on the cheaper scale of the salary budget.
So instead of asking "How much is the salary?", which is a degrading question, say "I'll work for no less than [the average salary + 50%]". Ping their arrogance until it shatters.
The overall idea is to beat the crap out of the interviewers. Insult their intelligence to the max, showing why they will face an imminent doom if you don't join them. As a conclusion: