Key to evangelization?

With the Year of Faith and more talk about the new evangelization, we hear a lot of commentary on what evangelization consists of and what it needs. Some say Twitter or flashy websites. Some say relevant music or welcoming messages.  Some say more programs and bigger conferences.
John Paul II said, while standing in Communism-riddled Poland on his first papal pilgrimage there in 1979:
"Where the Cross is raised, there is raised the sign that that place has now been reached by the Good News of Man's salvation through Love. Where the cross is raised, there is the sign that evangelization has begun. Once our fathers raised the Cross in various places in the land of Poland as a sign that the Gospel had arrived there, that there had been a beginning of the evangelization that was to continue without break until today."