I have good traffic standing from SERPS, around 600 unique per day... but I get very low ctr, like not even 1% (( any suggestions appreciated!
what is your website URL? Though, I'm also facing the same problem, but may be I could be of some help to you!
Usually you won't see any clicks until you reach about 1000-1500 uniques. (well any "stable" clicks you can measure) But you can refer to this guide for maxmizing CTR: http://zedomax.biz/blog/make-money-online/new-adsense-and-chitika-optimization-heat-map-version-2/
It is important for placement and making sure it blends in correctly. I dont mean to just reiterate the fundamentals but making sure you select the right color so it doesn't 'appear' so much like an advertisement helps. Also sometimes certain niches don't have "CLICKERS" as much as other niches. For example a savvy consumer may not be interested in clicking on google adsense.