There is the honey tek! You can put fresh shrooms in a jar, and fill the jar with honey and you get to keep fresh shrooms. The good stuff will leak out into the honey, so it is best to eat some honey with your shrooms. It is also best to use the smallest amount of honey possible, while still covering them. The honey turns a gorgeous blue color.
I don't do this much, since I like drying, freezing and gelcapping my shrooms. (Most of what I get are psilocybe cyanescens, which are very very hard for me to eat any more) Cubes taste not nearly as bad, but of course they are probably 1/3 as potent.
But the honey tek works! It may be the best as far as long term storage, since honey doesn't go bad and the good stuff will barely be exposed to oxygen. Plus, no refrigeration is necessary! I do recommend filling the jar to the brim. If you use a bunch of small jars you can only open a few at a time. If there is air space, mold can form on the very top of the honey, as it will turn a bit watery from the shroom moisture. Filling to the brim keeps this from happening.
My shrooms I thought were all very dry. They were in my freezer, but my freezer quit working this summer, unbeknownst to me. I lost probably 3/4 of my shrooms to mold. I guess they had just enough moisture to mold. That was all of my cubes, pan cyans, liberty caps, and half my ps cyans.
I was a saaaaad psychonaut.
Had I used honey, this wouldn't have happened.