For those who want to take things a bit further, in terms of coaching or personal performance, the CrossFit Level 1 Trainer Course is a great thing to do. You'll meet some great people, you'll have loads of fun and you'll learn a huge amount (and no you don't have to be a 'CrossFit Firebreather' to attend, it can be for absolutely anyone as long as you're willing to learn).
It's taking place at CrossFit Central London on the 17th and 18th March 2012. Click on the link above to book your place. If you want to get on this you will need to book straight away as they always sell out very quickly.