The following command does not deal with some future event we all wait for:

And he cried mightily with a strong voice, saying, Babylon the great is fallen, is fallen, and is become the habitation of devils, and the hold of every foul spirit, and a cage of every unclean and hateful bird. For all nations have drunk of the wine of the wrath of her fornication, and the kings of the earth have committed fornication with her, and the merchants of the earth are waxed rich through the abundance of her delicacies.  And I heard another voice from heaven, saying, Come out of her, my people, that ye be not partakers of her sins, and that ye receive not of her plagues. For her sins have reached unto heaven, and God hath remembered her iniquities. (Revelation 18:2-5 KJV)

God commands each of us to come out of Babylon now.  If we wait until she stands fully judged, then we fail the test and lose our rewards.  Not only that, we ourselves will actually share in her judgments and plagues. 

While it is said, Today if you will hear his voice, harden not your hearts, as in the rebellion. For who, when they had heard, did rebel? did not all that came out of Egypt by Moses? But with whom was he grieved forty years? was it not with them that had sinned, whose bodies fell in the wilderness? And to whom swore he that they should not enter into his rest, but to them that believed not? So we see that they could not enter in because of unbelief. (Hebrews 3:15-19 KJ2000)

What, then, is Mystery Babylon?  What does God require that we leave?

Love not the world, neither the things that are in the world. If any man love the world, the love of the Father is not in him. For all that is in the world, the lust of the flesh and the lust of the eyes and the vain glory of life, is not of the Father, but is of the world. And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever. Little children, it is the last hour: and as ye heard that antichrist cometh, even now have there arisen many antichrists; whereby we know that it is the last hour. (1 John 2:15-18 ASV)

God requires that we come out of the ways of the world system and that we walk in his ways.  What are the ways of the world system?

1. Public Schools
2. Sex outside of marriage between a man and a woman
3. Working for any business which conducts work that is contrary to God’s laws.  This includes corporations like Monsanto which genetically modify plants God created, corporations which pollute our streams and air, pharmaceutical companies which work to outlaw natural remedies and create drugs which affect men’s minds (sorcery), military manufacturing companies, armies which promote an evil agenda, medical companies which perform evil deeds like sex-change operations and abortions, and so on.
4. Living off the public with large multiple retirement paychecks
5. Wearing the latest fashions
6. Wearing the latest hair cuts
7. Tattoos
8. Piercings
9. Watching television programs
10. Watching most movies because they include much blood lust and sexual lust
11. Allowing your teenagers to date
12. Airplane trips to Europe (now you can stand by while strangers ogle your wife and daughter as they strip search them before boarding the plane)
13. And on and on. 

I am not trying to make a list of dos and don’t for you.  You need to learn to discern what is the world’s way and what is God’s way.  Failure to learn this principle of coming out of Babylon will lead to our judgment just as surely as it led to Achan’s death in Joshua’s day.