Your microphone is a vital part of your audio chain. It needs to perform consistently, day after day.

It should be obvious that taking proper care of this investment is important. Here are simple general rules and some specifics as it relates to the vast models of studio condenser microphones available. 

Eight common sense things:

1. Don't drop it. 

Simple enough.

Always make sure the shock mount is attached properly to the mic stand before installing the mic. In other words, install the shock mount first, without the mic.

When getting ready to mount the mic or put it away for storage, handle it like a newborn. Be deliberate and careful.

2. Do not expose it to moisture.

If you're using the mic outside, we need to talk.

Talking directly into the diaphragm from up-close is not proper mic technique for VOICE-OVER. It may be for singers and such, but voice-over generally requires 7" to 10" distance from your lips.

The mic should be mounted upside down with the top of the mic at eye level.

This proper technique prevents plosives and breathing directly on the mic with your hot breath. It should also allow you to not need a pop screen. You can use one if it makes you feel and look like a voice actor. But unless your voice is only good at a whisper, the pop screen is a constant reminder that you're on mic and not being that friend next door you'd like to have a beer with.

4. Don't expose it to loud noises up close.

5. Protect it from smoke and dust. 

Don't smoke around your mic, or anywhere, if you want the honest truth.

Some regions of the world are dustier than others. California is a dust magnet. More humid climates, not so much. If your mic is mounted properly (see above), dust shouldn't be a factor. But dust off any surfaces facing up, with a cloth.

Does it matter? I think plenty of people have gotten away with "whatever." But 48 volts is a lot of energy you're throwing onto a sensitive instrument. Common sense would dictate being careful. I think it's especially important to do this with older condenser mics. Make it a habit when disconnecting and re-connecting.

7. Unless you use a full locker of studio condenser mics, I have found that you can leave them mounted in one place, literally for years and they just keep ticking.

One could surmise that constant plugging and unplugging leads to wear and tear on the plugs, both male and female. Constant changing of mics adds potential handling accidents. 

8. When switching up mics, always return your mic to its "coffin."

It's designed to keep your cherished mic safe. 

BONUS ADVICE ...

So to sum up, be kind to your mics and they will be kind to you.

It's not a living thing, and it doesn't get jealous if you put it away in favor of a new flashy model. Just remember that it's a sensitive instrument and needs to be treated as such.