"Good customers are as rare as latinum. Treasure them."
- - Quark, 57th rule of acquisition
"Free advice is seldom cheap"
- - Quark, 59th rule of acquisition
and one for the all statists
"Every once in a while, declare peace. It confuses the hell out of your enemies."
- - Quark, 76th rule of acquisition
and several for all voters:
"Hear all, trust nothing."
- - 190th rule of acquisition
"Sometimes the only thing more dagerous than a problem is the answer."
- - 208th rule of acquisition
And a corollary about politicians and looters
"You can't free a fish from water."
- - Quark, 217th rule of acquisition

No speeches, but a couple of pithy lines from Working Girl's protagonist, Tess:

“I’m not going to spend the rest of my life working my ass off and getting nowhere just because I followed rules that I had nothing to do with setting up.”

“I read a lot of things. You never know where the big ideas could come from.”

Hello Khalling:
Here is one of my favorites:
Executive Suites- Climatic Ending-1954

http://youtu.be/vcEOsGvT0qA

JUST REALIZED YOU GUYS HAD ALREADY MENTIONED THIS ONE!
(Edited for update)

I always liked the "Greed is Good" speech in Wall Street.
https://www.youtube.com/watch?v=6Da1t...

Interesting that William Holden acted both points of view in 1954. In Sabrina he was learning from Bogart, and in Executive Suite he was teaching the same values playing the role of Don Walling.

Don't bother watching the 1995 remake of Sabrina with Harrison Ford. The 1954 version was a classic with Sabrina falling for a strong masculine character, but the later version changed the story to make Linus Larrabee a wimp. He "wins over" Sabrina by becoming a pathetic character.
EDIT - the story change illustrates how hollywood "progressed" over those 4 decades

"Today is Monday, and everybody works on Monday." -- Dave

"I'm as mad as hell, and I'm not going to take it anymore!" -- Network

"... And these are pork-bellies, which is used to make bacon. Like you might find in a bacon lettuce and tomato sandwich." -- Trading Places

I can't think of any scenes to add to the discussion, but WOW - what fun it was to view the ones suggested.

I don't have any "Films" in my cache but I was privileged to be a part of one at a company I worked for from start up. The main cog of which was moving on and I in his place and everyone else a move up to fill the slots.
I don't remember the entire thing only his closing remarks of which I'll never forget and often share.

"Your people are only as good as you allow them to be"
And that indeed was our recipe of success.

Howard Roark wants to create value for SOCIETY????

I've always liked the shareholders meeting speeches in "Other People's Money" where both sides of the argument are convincingly made.

First by factory chairman Gregory Peck:

https://www.youtube.com/watch?v=xJRhr...

Second by "Larry the Liquidator" Danny Divito:

https://www.youtube.com/watch?v=62kxP...

The thing I like about the pair of speeches is that they both do an excellent job of portraying opposite points of view -- neither character is a straw man.

Knowing Baldwin's political position makes his acting in GGR completely unbelieveble.
I recall seeing the broadway play of GGR in the 80's, and finding it a disgusting waste of my time.
The speech you refer to wasn't in the play. If it had been, it might have saved the play in my eyes, but I doubt it.