Depends on the power requirements for each circuit! If you've got a Pollack valve or two and maybe ane electric heater you'll likely want fused power directly from the battery, probably through relays. The cool thing is you should be able to mount MB relays that will do the trick under the plastic cover on the driver's fenderwell bracket, I think there is room for four relays or maybe even six! You can grab a couple relay sockets at the boneyard and then it can have an almost factory install look.

If you need power for some low power controller in the cabin area, one of the easiest and best places to get that if you don't want to go deep under the dash to the rear of the fuse box(which can be done but it isn't easy especially if your no longer young and limber) is to connect with a ring terminal to the lighting switch. There is both constant +12V and switched +12V at the switches terminals, they are aready fused, and its a very secure screw terminal. Pretty easy to get at also, drop the underdash panel, pull the knob off the switch, the nut is 24 mm remove it and pull the switch out from behind. You can run the new wire into the rubber boot and connect it up. Good Luck!