I believe that it is OK actualy GREAT to prepare. I dont know what you believe exactly, But I believe the end is very near, all the signs of the end times are here and it will come in a blink of an eye.
I suppose it also depends on what you believe will happen, see I dont believe in a rapture. My familys beliefs are that while God is pouring his wrath upon the non-believers we will have to fight for our lives, yes God WILL protect us and he WILL multiply our pocessions, but it also cleary states that Christians will be persicuted. SATAN and his follorwers will be out to kill and destory every believer. Then afterwards, those christians who are still inhabbiting the earth will live for the thousand year rein, were if you dont know, is 1000 years that satan will be bound and Christ will walk amoung us. So I dont believe that I will poof up into heavan, I believe I will suffer trials, tribulations and persicution, but my great mighty and merciful lord will bless me as I fight for him. If you feel you have a call on your life to prepare...then DO SO. Pray about your decision and make sure its what God wants.
A few verses that I feel are appropriate:
"The righteous will never be removed, but the wicked will not inhabit the earth. The mouth of the righteous brings forth wisdom. But the preverse tounge will be cut out." -Proverbs 10:30
"The Lord will guide you continually, and satisfy your soul in drought, and strengthen your bones: You shall be like a waterd garden and like a spring of water whose waters do not fail." - Isaiah 58:11
"Then I said "Lord How long", and he anwsered, "Until the cities are laid waste and without inhabitant, the houses are without a man, the land is utterly desolate, The Lord has removed men far away, and the forsaken places are many in the midst of the land., but yet a tenth will be in it., and will return and be for consuming as a terebinth three or as an oak whose stump remains when it is cut down. So the holdy seed shall be its stump." - Isaiah6:11-13
"Behold, I come like a thief! Blessed is he who stays awake and keeps his clothes with him, so that he may not go naked and be shamefully exsposed." -Revelation 16:15
"And I saw the souls of those who had been beheaded because of their testimony for Jesus and because of the word of God. they had not worshiped the beast or his image and had not received his mark on their foreheads or their hands. They came to life and reigned with Christ a thousand years." -Revelation 20:4
I hope you pray and take to heart what is coming, and do prepare yourself, but remember, that God will always be with you!
God Bless!