I just want to see if people actually follow the "ideas are useless, execution is everything" and "share your ideas ASAP" memes :)
Here's my stash: http://firespotting.com/submitted?id=shadowcats
Half-Bakery [1] was a great site full of random and crazy (and not so crazy) ideas. I'm pretty sure some of the stranger ones may even have come to pass. fwiw, I prefer that type of UI for collating ideas rather than the HN style.
I usually don't share them because it would take too much time and would defeat my main purpose. But sometimes I just can't help myself and do that anyway :)
For me it's cathartic, it spurs more creativity, and I get a very valuable reality-check on my ideas.
Also, I've met several people there already. Who knows, one of them might be a future startup partner.
Ever couple of weeks I go through the list of ideas and change the order of the items, putting the ideas which I want to work on first towards the top.
If they are unimportant I will forget them after a while and that is OK. If I forget them they are unimportant by definition. Keeping track of such things is a waste of time.
If I get really bothered by some temporary idée fixe I will work on it: search for more information, check my assumptions, analyze my options, maybe write some code to implement a proof of concept. This way at least I gain some knowledge for the wasted time and attention.
Sharing ideas of the first kind is just noise. I doubt anything can come out of it.
As for the second kind there are blogs, github, kickstarter, etc. They all put you into some process or format. Which is good if you want to make at least something useful from your idea.
Doing these things and failing 100 times in a row will almost certainly turn out to be a better use of your time than spending even 5 minutes looking for an idea by skimming through the likes of this:
[1] "A pinterest type service where if u spot a deal.." blah blah
[2] a rotating tube house
[2] http://www.halfbakery.com/idea/rotating_20tube_20house#13702...
Maybe you could post about your process here: http://firespotting.com/item?id=948
Firespotting is simply a more social way of doing the same thing :)
Need to do some more soon...
There are some which I share, some that I do not. :-)
I keep them in Things (a GTD-style app for iOS and OS X) in the category 'Someday'. This way I can jot them down even if I get an idea while riding the subway.
I should share them since I seldom 'Get Things Done' anyway (at least, the things categorized as 'Someday')...
I'm also starting to consider posting all of my ideas there.
Whenever a project gets legs and I want to share it, it's pretty easy to then move it into a separate repo and grant access to specific people.
One day (...maybe today), I'll turn some of these into Ruby gems. I have some kind of weird open-source stage fright, even after multiple coworkers have told me some of these deserve to be gemmed out...
Currently in there are things concerning drones, forums, social noise, voice recognition, encryption, new ways of programming, and data synchronisation.
I rarely share my ideas and rarely do anything with them.