Some time back we were discussing making cracked corn for chicken feed out of whole kernels. The fellow who writes the blog My Adventures in Self Reliance My Adventures in Self Reliance recommended the Cereal Killer Grain Mill. I went to that web page and they had quite a selection of different mills.
Grain mills web page
This may seem like a mundane topic but a grain mill is important. I have a vast amount of red wheat stored in nitrogen flushed Mylar bags, packed in sealed pails. If I need to eat it, it'll have to be milled. I don't picture myself out on the porch placidly grinding away with my matate. What I have instead is a nice grain mill that can be worked by hand, or by hooking it up to a bike or a small motor.
Shopping for a grain mill, or even allocating funds for one, is not very exciting. It's a lot more entertaining to go to the store and buy bulk packed food, or order freeze dried food in cans. Even if you don't store wheat or corn, though, at some point you are going to have to eat food that you grew or traded for. That will make a grain mill a precious commodity, and not one you are likely to be able to acquire post collapse. So if you haven't got one, perhaps it would be as well to put it on the list of things you need. If you do have one, try it out. You may find that buying one you can run off a bike frame is well worth the extra money. Once you get older and start having to deal with arthritis in your wrists, turning the crank on a grain mill is something to be dreaded. Pedaling on an old bike frame is not so bad. If you have a generator, you could buy a little motor to do the same thing in less space, but that would only work while you had fuel.