Thanks for explaining the leather fungus connection. After reading this I put all my glass in a plastic bin with silica packs.



What you need to do / should do depends greatly upon what sort of environment you are in. Are you located in a dry area or a very humid area?
Changes in temperature and humidity are what can cause mold/fungus. Storing a lens in a zippered bag may not be the best thing for it since it can't "breathe".
I think the important thing to consider is to store your lens in a dry place that has reasonable air exchange.
Nose up minimizes the oil-on-blade problem... or nose up is debated.. most of mine I Store them so that the aperture is higher than the focusing threads. On most lenses this means that the front cap goes down.
My cabinet is plugged in, has 8 shelves, and displays the internal temperature and humidity.
You might not need al that, but you might want to look at airtight dry boxes and silica gel packs. That is a cheap solution. I'd stick a $5 hygrometer in each box too, to keep an eye on the humidity in there.
Do not store any form of leather near any lenses.

Leave the shutter untensioned -- only exception might be Hasselblads. Good tip about setting the lens to the smallest aperture, though of course with an automatic diaphragm lens (SLRs) you may need to remove the lens from the camera to get it to stop down. Leather cases are a bad idea for longterm storage .
More or less, if where your gear is stored is comfortable for you, then your gear should be OK too.

Let air circulate.

Biggest cause of fungus is warm, dark, humid environments. And fungus needs food and food comes in the form of protein which leather is largely made of.

So
1. a Dryish environment
2. moderate temp
3. NO LEATHER LENS POUCHES
I learned this after I had already purchases lens bags ( really nice ones-- now I know why they were less expensive that I thought they should be.. ) for all my lenses... about 40... only to find out I took all of them out of their leather "capes"... to be free with air exchange around the lenses.

Exposure to UV light kills fungus which is why people say put in sunlight but my personal opinion is DRY and no fungus food is good. If you have a UV light source then put lenses under it for a few hours before putting into storage.