Windows/Mac + iPhone/iPod touch: Not only do videos take up a ton of space on space-constrained devices, but converting videos for the iPhone gets painful quickly. Air Video streams videos straight to your iPhone, converting them on-the-fly if they’re incompatible.

The app is actually an iPhone app plus a PC/Mac app that acts as a server. You can use any videos on your computer, whether they are in iTunes or not—and, if you prefer, you can also add video playlists from iTunes to the list of sources. Once you get the server app running on your desktop, you can start streaming over your home network immediately. Streaming over the internet from outside your home, though, only takes a few more seconds—in the server app, go to the “Remote” tab and check Enable Access from Internet (see below). The app will give you a server PIN that you can type in when you go to add a source on your iPhone or iPod touch—note that your router at home needs a public IP address and support UPnP or NAT-PMP protocols, which shouldn’t be a problem for most people.

As if that weren’t cool (or easy) enough, if you have some videos that can’t be played directly on the iPhone, you can convert them using Air Video as you watch it (as long as you’re running firmware 3.0 and have a fairly powerful computer back at home). If you prefer, you can also convert the file offline and watch it later.

Air Video is a free download for the iPhone and iPod touch, although the free version only shows you a few videos at a time, at random, from your folders. If you have a large video library you want to share, or don’t feel like clicking on the folder multiple times waiting for the video you want to be on the list, there’s a $2.99 pro version available as well.

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You spent good money on that huge library of VHS tapes, but now DVDs are where it’s at. If you decide to get rid of the tapes, hang on to their boxes and repurpose them to make these wicked spiral notebooks.

Instructables has a great step-by-step tutorial on how to create the coolest spiral-bound notepads around. If you have basic supplies like a hole punch, ruler, and pliers, then pretty much all you’ll need to spring for is a few pre-made spiral-bound notebooks from the office supply store (unless you happen to have a binding machine stashed somewhere).

Grab the store-bought notebook, pry open the crimped ends, and carefully unwind the spiral that’s holding the pages together. Use the notebook cover you just freed as a template for cutting your VHS box to the correct size.

Take the old cover or back of the notebook (hereafter “template”) and lay it on the box cover or back on the non-printed side. Line up the edges of the template and the box piece so that the hole edges are flush. Tape the two together temporarily if necessary. Now use the pencil to mark all of the holes you will make. Make a mark around the entire circumference of the circle, not just a single dot. When done remove the template.

The Instructables post will tell you everything you need to know about reassembling the notebook and more. The next time you have a couple hours to spare, grab the covers from your favorite VHS movies, put a few of these bad boys together for your next class or work seminar, and let your fan flag fly.

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