Ad-words can be very tricky and expensive at 1st. I've had some success in the past but lately have not been having good conversions. So I figured it's time to freshen up the campaigns a bit, plus start some new ones. One expensive little trick I tried was to try site specific targeting, I was amazed at how quickly Google was able to spend my money. In my opinion it is best to stay with keyword targeting and use the content network. I found I get less impressions but much better click throughs.
One thing I've just orderd and I'm curious to try is Google banner ads. I'm very curious to see the difference in conversion rates.