I've been making two loaves a week, sourdough and rye, for over a year now. After they cool overnight they go in the fridge for a couple hours just to make slicing them easier, then they get bagged and go in the freezer. This seems like it maintains 'freshness' the best. The toaster is more or less set to defrost a frozen slice on the first run and toast it on the second. Ironically, the starter mix does live in the fridge on a daily basis, never goes stale and never goes bad.