A couple of weeks ago I posted about safety on the water. The links on cold water survival and understanding what drowning look like were from a site called gCaptain. gCpatain also pointed me towards sites on tying knots and making splices.
As soon as one post caught my interest I found another post on the same subject as usual. As soon as you start thinking about something you're bound to find more of it in your travels. So may I present Andy's Most Useful Knots. If you're interested in how to make rope do useful things with easy to follow pictures and directions then that is a great page to start with.