This week at Lifehacker: Convince your boss you'll be 30% more productive if you could only have a second monitor. Save yourself 70 bucks and replace your iPod Mini's battery yourself. It's a bunch of nerds in a grassy field with circuit boards, LED's, homemade Segways and more! Check our special report from Geeks Gone Wild the first annual Maker Faire. Headed off to Circuit City determined to come home with an HDTV? Print out the short and sweet HDTV buying guide and stick it in your pocket before you go. Finally, when your hard drive starts growling at you in the midst of writing your final paper, automatically email yourself file backups to keep your work safe even if your disk platters go south.

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