Homesteading Today - Forum geared towards homesteaders, with some very useful tips for rural living and gardening.
My Tractor Forum - It's pretty much what the name implies. Various sizes and brands are represented, as well as non-tractor topics. Great resource if you're trying to keep an older tractor alive!
Orange Tractor Talks - Another excellent tractor info resource, this one Kubota specific.
City-Data Forums - Forums broken out by state. If you're looking for information about a particular area you can usually get an answer on these boards.
MDNR Camping and Recreation - We love camping and being out of doors, and use the resources on this site frequently.
Gecocaching - We love to hike, and geocaching gives us a destination. If you've never been and don't know what it's about, here's their Guide To The Game.
NOAA Interactive Snow Information - We used this extensively when driving from Ohio to up here. Useful tool for knowing what you'll be driving into.
NOAA Weather Radar National Mosaic - Another useful tool when you need to know what's coming towards you weather-wise.
Central Boiler - Manufacturer of outdoor wood boiler systems. This is the brand we have.