Acts 20:20 And how I kept back nothing that was profitable unto you, but have shewed you, and have taught you publickly, and from house to house,
21 Testifying both to the Jews, and also to the Greeks, repentance toward God, and faith toward our Lord Jesus Christ.
He may not have had tracts, but he did go house to house in an evangelistic way. His evangelism was by word of mouth instead of the printed page. The method is essentially the same.
I remember, years ago, I had a sermon on this verse called "The 20:20 Vision". It was based on literally going house-to-house with the Gospel.
I wish I could take back that sermon - or at least half of it. We do need share the Gospel whenever possible. But we also need to not burn ourselves out in ill-advised endeavors that God never called us to.
This verse should not be lifted away from its context. Paul was not speaking to
all Ephesians. No, he was addressing the
elders he had called to himself (v. 17). Read the whole context, verses 15 - 38, and one can see just who the "
you" of 20:20 was.
These were Christians, ones who merited Paul's especial labor and attention.
We often read a phrase and run with it, unconciously applying a modern slant to it. "House to house" reminds us of what, say, JWs do, going methodically down a neighborhood street. Yes, Baptists do it too, (though seemingly it less than in the 70s.)
"
House to house" probably means, basically "house church to house church". Or households of Christians, if not actual meeting places. To verify this just check out
Acts 2:46, where the other interpretation just doesn't fit:
"So continuing daily with one accord in the temple, and breaking bread from house to house, they ate their food with gladness and simplicity of heart."
Obviously, "house to house" refers to the new converts and the apostles. They did not go down the neighborhood streets breaking bread with all that they met.