Wireless Range Extenders are an incredibly handy way of fixing blackspots in your home network.
There are a variety of solutions, and this offering from Netgear is a particularly powerful one that not only extends your dual-band 802.11 b/g/n networks but also sports four Gigabit Ethernet ports for non-wireless devices.
Designed to work with more than just Netgear routers, it pairs using push button connectivity. Once paired it transparently extends your network.
This fire-and-forget nature makes it one of the easiest devices we have encountered, and by adding wired support to wireless it provides a very flexible solution for areas where there are lots of devices (like home offices).