Jack: I think I sent my spares list via email, so I won't copy it here unless someone really wants it (it's extensive).
Anyway, Rain-X is fabulous. Drove from Washington DC to Beaufort last Christmas in a constant downpour, at night, and never used the windshield wipers. LOVE Rain-X!!
Not as sure about the anti-fog stuff - I have some but never used it. Instead, I have an Eddie Bauer anti-fog sponge - it's a sponge wrapped in chamoix leather. Just wipe it across the windshield and fog is gone but the anti-fog stuff is intriguing.
I also have a roll of blue painter's tape for outside use on seams that leak (especially the top of the windshield to convertible top).
Tool kit: multi-tip screwdriver, 3/8's ratchet, short extension, several metric sockets, spark plug socket, tranny drain hex drive, adjustable (Crescent) wrench, feeler gauges (for valves), mini-Mag lite, small pliers, some tie-wraps, all in a roll-up, canvas tool holder and all put down next to the battery up front. Have a modified Ford Windstar scissors jack (it comes with a 19mm wheel stud socket/jack crank) stowed right behind the driver's seat. Behind the pass. seat is a small tool bag with a couple of FRS radios, dipstick thermometer, dual-sided velcro strips (used in IT places for cables), couple of bungee cords, couple of terry rags, spare glasses, earbuds for my radios and IPOD, micro-fiber cloths and a small tube of silicon adhesive/sealer (may be more, I just can't remember it all).
There is also a lot of un-used space all around the cockpit, under the hood and in the engine compartment: behind and between the seats, under the seats, the rear seat area, the battery well up front, left and right of the spare tire, in the engine compartment (I've seen quarts of oil stored back there away from the engine and held in with small bungees) and so on. Get in the car and sit there and look for spaces to put stuff, especially soft, crushable stuff.
Put soft, light weight but bulky stuff into that water-resistant suitcase on the rear rack.
I installed a 12V aux socket for the GPS up under the dash and just stick the GPS on the windshield.
I have a CB radio in the truck, but not in the Speedster. I've used it in the speedster, though. Works OK with a truck mirror mount attached to my nerf bar, but I got a little alternator whine. I just get real tired of the raunchy language you often get, even though sometimes the info about what's ahead is good. Just went to New England and back in the past two weeks without CB and didn't miss it.....got 5,000+ tunes on my IPOD and listen to that, instead (and I subscribe to "CarTalk with "Click and Klack"....10 hours of it on the trip down, until my wife said; "ENOUGH!!!!").
Stay tuned, we'll all probably think of more stuff, too.
gn