Let the tubers dry and remove all loose soil from them
Cover them with dry sand, sawdust, compost or whatever and keep them in a cool frost proof place where mice can't get at them. If you want to remember which is which you can attach labels - we think we will remember but we seldom do...

Mine are in pots and all I do is put the pots in the shed and leave them there all winter. They always start again in spring.