"God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets, Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds;"
Isn't that good? Have you heard that before? You should have. It is Hebrews 1:1-2. What God is telling us in this passage is that wherein times past he spoke "new" words of revelation by the mouths of prophets, upon the closing of the canon of scripture the whole of what He has to say to us is contained in the pages of scripture. Jesus Christ is the Word made flesh.
So the next time you hear someone proclaiming that they have a "Word from God," what better come from their lips (or keyboard) next is only the text of scripture, and it needs to be in context (read the rest of Hebrews 1, and I think you'll see that I've not violated context here). Scripture alone is infallible, and is the only way God communicates with us, His beloved people.