Be sure of your vision...
First and foremost, a believer must have a vision.
Where there is no vision, the people perish: but he that keepeth the law, happy is he. Proverbs 29:18
Make sure the vision is from God.. and then write it down and live it out in faith...
And the Lord answered me, and said, Write the vision, and make it plain upon tables, that he may run that readeth it.  For the vision is yet for an appointed time, but at the end it shall speak, and not lie: though it tarry, wait for it; because it will surely come, it will not tarry.  Behold, his soul which is lifted up is not upright in him: but the just shall live by his faith. Habakkuk 2:2-4
Definitely make sure it is from God and not from someone else...especially someone who claims to speak for God and yet they do not.
There are a lot of those out there today.
Thus saith the Lord of hosts, Hearken not unto the words of the prophets that prophesy unto you: they make you vain: they speak a vision of their own heart, and not out of the mouth of the Lord .  They say still unto them that despise me, The Lord hath said, Ye shall have peace; and they say unto every one that walketh after the imagination of his own heart, No evil shall come upon you.  For who hath stood in the counsel of the Lord , and hath perceived and heard his word? who hath marked his word, and heard it ?  Behold, a whirlwind of the Lord is gone forth in fury, even a grievous whirlwind: it shall fall grievously upon the head of the wicked.  The anger of the Lord shall not return, until he have executed, and till he have performed the thoughts of his heart: in the latter days ye shall consider it perfectly.  I have not sent these prophets, yet they ran: I have not spoken to them, yet they prophesied.  But if they had stood in my counsel, and had caused my people to hear my words, then they should have turned them from their evil way, and from the evil of their doings.  Am I a God at hand, saith the Lord , and not a God afar off?  Can any hide himself in secret places that I shall not see him? saith the Lord . Do not I fill heaven and earth? saith the Lord .  I have heard what the prophets said, that prophesy lies in my name, saying, I have dreamed, I have dreamed.  How long shall this be in the heart of the prophets that prophesy lies? yea, they are prophets of the deceit of their own heart;  Which think to cause my people to forget my name by their dreams which they tell every man to his neighbour, as their fathers have forgotten my name for Baal.  The prophet that hath a dream, let him tell a dream; and he that hath my word, let him speak my word faithfully. What is the chaff to the wheat? saith the Lord .  Is not my word like as a fire? saith the Lord ; and like a hammer that breaketh the rock in pieces?  Therefore, behold, I am against the prophets, saith the Lord , that steal my words every one from his neighbour.  Behold, I am against the prophets, saith the Lord , that use their tongues, and say, He saith.  Behold, I am against them that prophesy false dreams, saith the Lord , and do tell them, and cause my people to err by their lies, and by their lightness; yet I sent them not, nor commanded them: therefore they shall not profit this people at all, saith the Lord .  And when this people, or the prophet, or a priest, shall ask thee, saying, What is the burden of the Lord ? thou shalt then say unto them, What burden? I will even forsake you, saith the Lord .  And as for the prophet, and the priest, and the people, that shall say, The burden of the Lord , I will even punish that man and his house.  Thus shall ye say every one to his neighbour, and every one to his brother, What hath the Lord answered? and, What hath the Lord spoken?  And the burden of the Lord shall ye mention no more: for every man's word shall be his burden; for ye have perverted the words of the living God, of the Lord of hosts our God.  Thus shalt thou say to the prophet, What hath the Lord answered thee? and, What hath the Lord spoken?  But since ye say, The burden of the Lord ; therefore thus saith the Lord ; Because ye say this word, The burden of the Lord , and I have sent unto you, saying, Ye shall not say, The burden of the Lord ;  Therefore, behold, I, even I, will utterly forget you, and I will forsake you, and the city that I gave you and your fathers, and cast you out of my presence:  And I will bring an everlasting reproach upon you, and a perpetual shame, which shall not be forgotten. Jeremiah 23:16-40
Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world. 1 John 4:1
Even when we are on the right path we should still continue on in prayer and in the Word in order to keep our focus...
Thy word is a lamp unto my feet, and a light unto my path. Psalm 119:105
If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given him.  But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed. James 1:5-6
Pray something like this:
Shew me thy ways, O Lord ; teach me thy paths.  Lead me in thy truth, and teach me: for thou art the God of my salvation; on thee do I wait all the day. Psalm 25:4-5
Most importantly, since the vision is from God, let Him lead the way, always.
But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you. John 14:26
Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.  He shall glorify me: for he shall receive of mine, and shall shew it unto you.  All things that the Father hath are mine: therefore said I, that he shall take of mine, and shall shew it unto you. John 16:13-15
The steps of a good man are ordered by the Lord : and he delighteth in his way.  Though he fall, he shall not be utterly cast down: for the Lord upholdeth him with his hand. Psalm 37:23-24
I will instruct thee and teach thee in the way which thou shalt go: I will guide thee with mine eye. Psalm 32:8
Trust in the Lord with all thine heart; and lean not unto thine own understanding.  In all thy ways acknowledge him, and he shall direct thy paths. Proverbs 3:5-6