Affiliate Marketing Secrets

I’ve just completed my first Clickbanks.net Affiliate Campaign using Google Adwords, and I’d like to share my results and ask for advice from more experienced marketers.
I’m using the campaign management methods outlined in Michael Tandiono Affiliate Blueprint 1.0, using Affiliate Prophet for tracking and also Google Adwords Editor, Market Samurai & Speed PPC. I’ve also started using Affiliate Espionage to research my next campaigns.
My first campaign currently with an increasing gravity of 511, commission of $33 and 6.8% refund rate. I monitored the ads for a week or so prior to starting my campaign and found several which had been running for over 7 days. I bid on approx 90 keywords, average position 2-4.
After 17 days I’ve had –
* 18 Net sales of $580
* Average of 60-100 clicks per day costing $750
* So I’m down about $170
I’m uncertain about what conclusions to draw…