Also, on the Exit on left or exit on right (http://media.tumblr.com/tumblr_mbyisdluoz1qhkzpz.jpg) - I don't think that applies to all cities. I know for a fact there is some signs in my city that do not do this, especially older signs.
The spoon breaks the surface tension of the bubbles, causing them to pop when they start to boil over.
Other people seem to be saying a metal spoon should work just as well (with the added bonus that it won't warp, unlike a wooden spoon), with the only downside that it will be hot to take off. I'm doubtful that a metal spoon would work as well though, because metal does not absorb moisture like wood and also has a smoother surface (i.e. less surface area on a microscopic level), and so it probably wouldn't be as effective in making the bubbles attach and pop. Of course the only way to know for sure would be to do an experiment.
I'm no chemist, but my observations from cooking and homebrewing, pasta and wort boil over worse than plain water because dissolved starches/sugars/proteins allow the bubbles to have greater surface tension and hold together better. If you cook with more water but the same quantity of food, the bubbles have less surface tension and you can probably avoid the boil over scenario altogether.
For this particular life tip, I would expect a starch-laden foam from cooking pasta to leave a residue on the spoon as the bubbles popped that would eventually let it boil over still. It will buy you some additional time before a mess is made of your stove though.
No, I'm not being entirely serious, and yes, I too look forward to the day when 3D printers are common-place and used effectively and efficiently. But even so, I hope that people will always find inventive ways to reduce, re-use and recycle, especially when they are an inventive as some of these. I've already used two of them this morning.
Spit also works, which is handy when you are in the sea, but not so much when you have to clean your headlights :)
The cold towel will absorb heat from both the drink and the room in a room, but only the drink in the freezer. and it will do it much faster than the air would.
Secondly, friendly recommendation - you should check out Reddit. You're a serious HNer, so I assume you care at least a little about the goings-on online, and Reddit is a big part of the internet now. See it, if only to be able to say that you saw it.
I barely visit Reddit myself, but there are a few things it's good for - for example, information about specific topics tends to be found in subreddits about that topic. E.g., I started playing piano recently, and to get interesting info on it, searched "piano reddit" in google. Not only are there generally good discussions there, some popular reddits like this one have an FAQ which lists links to lots of previous discussions you might be interested in.
Later I used toilet roll core to hold some wrapping paper neatly, and I'm looking at using more to tidy some cables. I've made notes of several of the others and am putting them in my associative store. I expect I will use the "USB on TV to charge phone" idea at some point, I'll just need to remember it at the right time.
As for reddit, yes, perhaps I should go, but I have enough infinite time sinks already, and I'm disinclined to add another. If it pops up in a web search then I'll use it, but otherwise I'm unlikely to get started. I tend to be a bit obsessive, so not reading is better than reading and trying to limit myself.
And I'm not really a serious HNer, although sometimes people get the impression that I am. There are other things I do way more seriously.
Everything. If you try visiting reddit.com/r/<pickaword> there's a chance it exists.
edit: Oh I see, that's exactly the same kind of crap this submission is.