In my extremely humble and highly biased opinion, these are the best postings I've done here. If you'd like to start looking through the blog, this is a good place.

Somers Town Coffee House

Researching Shares 

Decentralising the Electricity Supply

Sweden to be Oil-Free by 2020 – What about the UK

Why Own a Car

Warming Camden Council's Homes

Bloggers are our Protection against Overzealous Corporations

Trees, January 2006