Originally Posted by ampalert
In this thread, I was just asking where best to get a power source to supply a new socket in the attic?
A wire in the wall
Seriously though, it all depends on what is already up there. If you have a circuit that is only running some lights, it could probably take the load of an outlet. If you're going to be running major power tools, then it may be best to run a line directly to your panel and put it on it's own circuit.
In the last three days I have mapped every light and outlet in my house, so I know exactly what is powered were and what the loads are on each one. It's a pain in the neck, but is actually very useful. You may want to start by doing that, and then decide if you can add the load to something that is already run.