List building - what are your pain points?
It took a lot of trial and error to come up with answers to that question that I could live with. I couldn't afford the courses of the big boys, so I had to learn myself. Trial and error = cost. Expensive education. I could probably have saved money in the long run by investing the cost in learning from an A-lister.
Another thing I found is that there is a LOT of stale information, even in recent products (some of what I though was crap really wasn't, but that's another story).
So here's the question - you want to build a list, because you've been told that's where the money is. What is it that you NEED to know that you haven't been able to find the answer to?
The 2nd Amendment, 1789 - The Original Homeland Security.
Gun control means never having to say, "I missed you."