Got an old WiFi router lying around or want to just shell out about $30 for a new one? Take that, install some new firmware and you’ve now got a WiFi repeater. Just follow the (somewhat technical) steps in this detailed Lifehacker article titled “Turn Your Old Router into a Range-boosting Wi-Fi Repeater”. (I’m thinking of giving it a try this weekend providing my old router is on the list of supported devices.)