One thing ive found in my PPC campaings is that changing one little thing like a picture on my landing page can have a dramatic effect on conversions. Im wondering how many clicks you guys would say to let an offer go for before changing something? Normally I've been doing about 200 clicks before I drop a campaign (If I have 0 leads) but now im thinking I might have dropped some good ones and should have tried more before dropping them. However if I start a campaign and let it run for 200 clicks with no leads, change my landing page and let it run for another 200, etc, etc thats going to get very costly. What would you guys suggest?
If you think there is money there, keep testing. Collect every statistic you can and try super hard to make a handful of conversions. Then look to see if you can figure out why those couple of conversions happened. This is just one method.