I spent the whole day in Harrow receiving one-to-one tuition from Giles Angel, who is a very talented photographer and retoucher. Ideally, I want spend as little time on post-processing as possible, but there are times (particularly with infrared) where some tidying up is required due to hot spots and lens flare.
Giles took me through Bridge, RAW and CS3, working on several of my images. He also explained the importance of colour space, and when to shoot in JPEG or RAW in order to minimise post-processing.
Alot to take in but hugely beneficial!