I remember fondly an article that made it to the front page, once, that said you specifically shouldn't tell people about your ideas. It purported that, chemically, the pleasure of explaining your great idea to someone is similar to the pleasure of actually accomplishing it. So, it claimed that for every person you tell about your idea, you're less likely to actually do it, since you have already enjoyed the pleasure of telling someone about it. Just thought it was an interesting note that flies in the face of the first point made by the blogger, via Seth Godin. No idea if it's true.

Announcing your plans makes you less motivated to accomplish them - http://sivers.org/zipit

Another way to kill a great idea is to fail to implement it.

This post brought to mind an old ze frank video: http://www.zefrank.com/theshow/archives/2006/07/071106.html

Huh. I thought this was actually going to be an article on how to stop your mind from obsessing over "great ideas", or tell when a "great idea" is bogus. I was disappointed to find it was just more cheerleading.

Maybe we still don't large enough concentration of any kind of ideas, let alone great ones. Cheerleading is useful, and you have the basic dos and donts in the article to stop it from becoming a bogus idea.

A lot of ideas people have are like wishbones - http://www.nilkanth.com/2009/07/09/selling-fake-wishbones/

why people let their ideas to go waste? why don't they think that their ideas may lead to good startups?

excellent post about Ideas for Startups http://www.paulgraham.com/ideas.html

I get many cool ideas, that I all shoot down because I can't think of a business model for them.

That's why you need a business-minded partner. :)

...or you need to move on to other ideas.

Not everything is worth monetizing.

I'm actually a fan of deploying ideas for free, assuming one can afford the luxury of giving a potentially money-making idea away.