Well, I'm off work today and have treated myself to a private snowboarding lesson at the Chill Factore in Manchester (1/3 off the price if you are a member). I haven't had a proper lesson since last year, although I did have a little go on the local 'mountain' earlier on this year.
Like anything else you need to keep practising. The nearest place is the dry slope at Runcorn, but it's completely different on real snow and I want to be competent enough to do it for real by this winter coming.
The worst thing is the horrible, horrible drive to Manchester, so I've booked it for midday which gives me time to avoid the 'rush' (i.e, 'crawl') hour. Even so I will have to go really early in case of delays. Still, it should be worth it.