
The idea of a "server" usually conjures images of rack-mounted, temperature-controlled boxes, or at least a desktop system, but a laptop's power-scaling abilities, small size, and built-in screen can actually make for a quietly-great unit. You could put it next to your printer to allow printing from anywhere, use a browser to get it grabbing BitTorrents in Windows or Mac systems, or set up your own web server for grabbing files or hosting things like your personal Wiki. Oh, and don't forget your multi-purpose media server, if you've got the hard drive space. Once you're set up and have enabled outside access, the world—or at least your files at home—is at your fingertips.
Unless you avoided the big stores entirely last holiday season, you've probably noticed the boom in digital picture frames—those small $100-and-up devices with not-so-amazing screens and a canned slideshow ability. If you know your laptop isn't much for getting anything done these days, consider bending it over backwards to make for a sizable, attention-grabbing frame that can show whatever you want and possibly even grab photos as they're dropped on a main computer. Instructables has a highly detailed guide to taking apart a MacBook to get started, while Popular Science shows an alternate scheme using an old ThinkPad. To keep your spare laptop from becoming a power draw (or running long and hot), consider setting up timers to run your "frame" only during your waking hours.
Very slim (97 MB) distribution, but retains a basically smooth and polished interface, with apps to cover common computer uses.
For those who live inside their browser, gOS isn't so much a gimmicky "Wal-Mart OS" as a webapp-focused version of Ubuntu, with a lightweight window manager (Enlightenment) and an OS X-like bottom dock containing most of what you need
Not for the faint of heart or unsteady of hand, this Instructables guide runs you through the basics of turning a perfectly good LCD laptop screen into a vertical-mounted monitor. Havingl pulled apart a laptop myself to replace a monitor cable, I can just tell you that you should go real slow, and make sure you have a place to put all the spare screws and parts during disassembly.
Assuming your laptop didn't die from hard drive failure, those little magnetic platters inside it can make for a really handy pocket-sized external drive. Follow Lifehacker alum Rick Broida's instructions on properly enclosing a 2.5" drive, and you'll have avoided paying a premium for a seriously useful addition to your computer inventory. Photo by Justin Ruckman.
If your trusty laptop is running OS X, Vista, or XP, you can turn on its hot spot abilities with only minor tweaking. Linux users should check out this Linux.com tutorial for general guidance, while Ubuntu fans can get more specific instructions here. Finally, those who also keep an Xbox on their network but think Microsoft's $100 wireless adapter is a bit much can jerry-rig that shelved laptop to serve as a stand-in.
I tried to cover the basics and a few quirky ideas for an old-but-trusted laptop, but many of you have years of experience on me in this area. What's the coolest, or most useful, thing you've done with an old laptop? What do you wish you could do with it? Share your tales and wishes in the comments.
Kevin Purdy, associate editor at Lifehacker, hopes he never has to part ways with his ThinkPad. His weekly feature, Open Sourcery, appears every Friday on Lifehacker.