MediaShift offers some tips on adding to credibility and developing trust in the face on an onslaught of amateur reporters and crowdsourcing.

“If you were a professional journalist and I asked you, “What does
mainstream media provide that the crowd can’t?” I have some guesses
about what I might hear in your answer: It’s more credible, more
comprehensive, fact-checked, less biased, professionally composed, more
knowledgeable, presented in the larger context, and more reliable, to
name a few.”