So far I've lost several front lens caps. Someday they'll show up but in the meantime I need to replace them... Where's the best place to get them? Would Ebay work for them? Just don't have a clue where to start looking.
It doesn't need to be a Nikon branded cap - unless you're after the Nikon badge on the front. Most lens caps are designed to fit into a standard filter front (assuming you've got a skylight on the ront of your lens) - it's just a case of finding one the right diameter.
I've also see a neat little item which is a sticky pad which sticks onto the outside off the lens cap, with a cord and plastic loop on the end, so you can loop it around the strap attachment point on the body. Pull of your lens cap and it's left dangling from your camera body.
You can get Nikon OEM ones from B&H - that's where I got mine. I recently replaced all of my lense caps (those that have the corner push things) with the newer ones that have the pinch release in the front, so that I can remove the lense cap with the hood in place.
I dunno about those lense cap teathers, I have one on my Sony miniDV cam, and man is it annoying to have that thing swaying back and forth (especially for video where it records the sounds of it banging into things).
I usually take my cap off in the begining of my photoshoot, put it in the bag where the camera or case where I hold the camera, and leave it there. At the end of the day, I put the lense cap back on and store the camera for the nite.