The "aaahh" sound that Jas mentioned helped me to stay focused with DS and not lose it. I think it meant I was in control of the contractions.
Other things were stomping whilst leaning on a windowsill. I found an object (a blue office chair) to stare at in a window across the courtyard (well, until the stupid cleaner turned the light off!), once things got a bit unbearable, I hopped in the shower, where DH alternated the shower head between my front and my back, whilst I lent on the handles and stomped. I also blew the pain away down the plughole - this really seemed to help. But for me, movement was the biggie, no way was I sitting down.