This is a plan for immobilising a Raspberry PI in a domestic environment, without children or pets, in order to run it without killing it with static. I have no idea whether this level of precaution is required, but it's been about two weeks, and it hasn't died so far.
Step 1: Parts
I used a block of 4x2 construction timber, left over from a painting job, some 25mm x 8g screws, left over from a gate numbering job, some anti-static bags cadged from a computer shop, and a Raspberry PI B.
Anti-static bags come in three sizes, in order from small to large: memory, disk and motherboard; I ended up using one of each.