This week at Lifehacker: Build an auto-on pantry light with a Timex watch holder. Replace your iPod's hard drive. Make an RFID-blocking duct tape wallet. Finally, instantly inventory your gadget stash off-site for insurance purposes when the house blows up.

Open the door, light goes on. Close the door, light goes off. The system works in the refrigerator, and it's pretty nice in a dark pantry or closet as well. DIYers, rig up your own auto-on pantry light with some Christmas rope lights, a reverse switch and a plastic Timex watch holder.

iPod sad face? Save yourself 150 buckeroos. Buy yourself a new hard drive and crack that baby open, you bold take-things-aparter, you. Replace your fourth-gen pod's dead hard drive with a screwdriver, stick glue and a little elbow grease.

That identity thief sidling up to your butt with a RFID-reading device? Foiled (literally) by your custom-made RFID-blocking duct tape wallet.

Now that you're all grownup and responsible with actual homeowner's insurance, it's up to you to keep track of what gadgets you've got. Snap a few quick pics of serial and model numbers and upload to a photo-sharing site for instant personal off-site inventory.

Lifehacker's Power User column appears every Wednesday (most of the time) on Gizmodo.

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