In a guest post on Clayton Makepeace’s blog yesterday, Daniel Levis revealed the results of a split test between single and double opt in mailing lists. The results were surprising.
First, he showed how many subscribers each list got, and how many of the original subscribers were still subscribed a year later. Single opt-in won both [...]

I use three main tools to track my websites’ traffic. Each has a different focus and provides different benefits. One tracks potential traffic sources. One gives real-time feedback on actual incoming traffic. And one shows me the long term big picture of my websites’ traffic.
The first tool is blog search — I subscribe to blog [...]