Twitter can be a very valuable resource if you follow the right people.

No matter what industry you are interested in, there are leaders worth following on Twitter.

One example for finance, Cliff Asness. He's a billionaire quant hedge fund guy, but he tweets every day.

There's a ton of investors, businesspeople, reporters, programmers, researchers, etc. that are very active on Twitter, not to mention the plethora of comedy accounts that I find hilarious.