We all know about the free gifts and autoresponder service to build a list...

The second best way to build a quality list is to find reliable swap partners or solo ad sellers with quality lists. It's hard to find these, but before you agree to swap or buy a solo you should ask questions and check out their stats/free gift/squeeze page etc.

The best way to build a quality, responsive list is through launches and selling products or services, where you build a "buyers list". This will be your most valuable asset over time. Then it will be a lot easier to test conversion on new products and find potential partners to JV with. Which will grow your list even faster every time.

Don't think too lightly about this though. It takes time...

Andre