It’s always good to know what your competition is up to, so naturally, if they have blogs, you should subscribe.
A few other useful tools:
Traffic Stats:
I’ve found 3 good tools that track traffic. None of theme seem to be overly accurate for small sites. Even for medium sites the numbers often don’t match the truth. (Comparing visitor stats from google analytics vs these tools shows a very significant underestimation for me). I know these stats sites track mostly US visits, but even taking into account that they seem to underestimate. I use them with the hop that they equally underestimate everyone.
Here are 3 sites that I use to check stats:
Alexa: (often said to be inaccurate by techcrunch)
http://www.alexa.com/search?q=www.momentville.com
Quantcast: (They do a good job of providing more info about the type of visits)
http://www.quantcast.com/momentville.com
Compete: (they have pretty graphs that let you compareup to 5 websites at a time)