Hi Simon,
on Ohlins web site (and maybe from the other manufacturers) you can find useful tips for setting your bike. Also, I have found good description of understanding suspension and tips for adjusting from someone on R1, years ago. If you want, I can send it to you. On the net, there is a lot more, but it is up to you whom to beleive .
However, lots of reading, be patient and systematic and you will sort it out.
Petre