[Jason]

What is your preferred methods?  Which methods do you feel are better?  What are some challenges involved in any of your choices?

[Anurag M]

I think this can be useful. The more data we have about potential customers the better.

[Ja sa bong]

It depends on the kind channel which you're interested in using for reaching out to your buyers. If it's through social media sites, it's paramount to build your followers.

[Jason]

I haven't tried to build to build an email list.  However, I have built a large social following with music lessons.  Anyway, tough, I'd like to make another following with another niche such as employment or web development, but no money at the moment.