Throwing stuff up on the Internet can take time. But do you remember Clickbank and the My-Linker Cloaking tools? These tools can help you monitor where you are getting clicks from. Monitoring these tools will help you know which of your campaigns you are running are generating leads or sales. These areas will be the areas you want to focus on when taking your next step. So, should I start a new campaign every week or keep building on the same one? Look at it this way:

Ever heard a great piano player? I mean someone that just blows you away? Well he wasn't born a piano player per-say. He had to practice and practice - and practice some more before he could play like that. It will be the same for article marketing. You will need to practice, refine your strategy, look at what works and what doesn't work - BUT you will need to focus on doing things correctly.

If you stay with a certain niche you will learn quickly what is working for it and what isn't. I say stay with your main campaign, sure build new ones, but focus your attention on one. You will learn, change things, and like the piano player - you will get better!