What is your favourite hour of the year? If you don't know, make it 8.30-9.30pm, just after dinner tomorrow and do something worthwhile to justify your choice. Most of the British population will be watching television, but you can buck this languorous trend by observing ‘earth hour’. The idea is to switch off the lights, use as little electricity as possible, and use your own energy in a more creative and satisfying way. Katee Hui at the charming site dothegreenthing.com recently asked me in my capacity as a chess Grandmaster to write a blog for them on why a game of chess was a good way to spend the hour, but there may be even better ways, including cuddling or indeed similar movements of that nature.