Seed sorting

I should be tidying up after Christmas and sorting other things, but somehow, as soon as the last decoration comes down, I feel a pressing need to audit my seed collection. The rattling of seed packets is a great comfort in the depths of winter (especially when they arrive in the post - it's like another Christmas). Some seed needs to be sown fresh and won't store well, but in general if you keep seeds in a cool, dark place and they should be viable fro a lot longer than it says on the packet.