I added a 6 slot fuse block under the passenger seat along the subframe rails. It is "powered" by a relay that is connected to ground, positive battery lead, and a switched positive source (I forget what wire I found & used). This allowed me to "hardwire" 6 different accessories (heated grips, heated jacket harness, gps, Sirius radio, radar, and amp/mixer) without overtaxing any existing circuit and all them have switched power, so I don't have to worry about killing my battery. I also wired a cigarette lighter/plug under the seat that has constant 12v (unswitched).
Got the fuse block at Advanced Auto for about $8 (Autozone carried one too, but I didn't like it as well). Relay came from Radio Shack for about $5. Then just need some wire and connectors/solder. All of my power wires are neatly routed tucked away now, with no big clunky cigarette style sockets and cords.
I did have to buy some device specific hardwire kits for my GPS & radar I believe. Found those on ebay or Amazon.
My modesty is FAR superior to yours.