I'm wondering if there is a convenient power source inside the firewall for powering accessories. I just installed some foglights, and wired the 2nd power lead (not the one that draws much current, it is more of a on off switch so that the lights can only function when there is power, preventing you from leaving them on) to my cigarette lighter fuse in the fuse box. this was intended to be a temporary fix, since it is ugly and not very nice. I'm also going to install a rear door opener when I get some time and am wondering where to power it.

So what I'm asking is: Where is the best place to power internal accessories? (both all time and only when the key is turned)
Or do I just need to go through the firewall and go straight to the battery?

oh and pictures are always great