Over the past few days, the most popular post on this site has been our explanation of how Digital Signatures & Encryption works. Understanding this is key for our society to get past the point of using dead dinosaurs (gasoline) to ship around dead trees (paper). Please take a few minutes to read it and pass it on.

You might think, or might have been told, that washing your hands under hot water kills more germs. Time-saving, heat-bill-lowering cold water, however, works just as well at removing contamination, and saves your hands some stress.

Photo by aka Kath.

You don't want to play DIY plumber or call one just yet, but you can't stand the harsh chemicals in most drain cleaners. Solution? Make your own eco-friendly drain cleaner.

Why pay to water your plants when in most locations more than enough rain falls right on your roof? Photo by madmack66.

You've probably heard that keeping your refrigerator and freezer fully stocked is a simple way to keep them running efficiently. But what if you happen to lack for food, or want to optimize even further?

Photo by monkeyc.net.

Among frugality blog Wise Bread's eight tips for re-using old, nearly-busted socks in creative ways, this little gem that's perfect for the warmer weather ahead: Drop in a good amount of baking soda, then stuff them in your footwear when your feet aren't in them. They should be kept smelling a little fresher, with a bonus of not collapsing in shape when they're empty. Got industrial-strength foot funk?

Electronics aren't an easy thing to get rid of, at least with a clear eco-conscious. Luckily, Wired's How-To Wiki has done the grunt work of tracking down and detailing the major hardware makers' recycling programs.

Photo by ▌ÇP▐.

iPhone/iPod touch only: Locavore is an iPhone app for those who have a hard time remembering what foods are in season, and also tells you where to get them fresh and how to cook it all.

GOOD Magazine has a pretty, and pretty comprehensive, chart that suggests ways both serious and subtle to reduce your water consumption.