A: "ask" for information: the more you know, the more relaxed you'll feel
B: "breathe" rhythmically, and relax as you breathe out
C: "cuddle" your partner or birth companion
D: "drink" sips of isotonic drinks or water in between contractions; "Doula" ;-)
E: "eat" carbohydrate-rich foods little and often if you feel hungry
F: "fan" yourself with a small electric fan 
G: "groan" and moan: making a noise is a great coping strategy!
H: "hold" your partner's hand 
I: "imagine" your baby moving down through your pelvis with every contraction
J: "joke" with your partner and your midwife to keep things in perspective!
K: "kisses" (from your partner, mum, sister, friend)
L: "listen" to music to distract you and help you relax
M: "move" around to make yourself as comfortable as possible
N: "nestle" down in a large pile of pillows or a huge bean bag 
O: "open" your pelvis as wide as possible to help your baby be born: kneel on one leg with the other out to the side
P: think "positively" that "Each contraction brings me closer to the birth of my baby"
Q: "question" what you don't understand. Being frightened will make the pain worse 
R: "rock" your pelvis round and round and back and forwards with each contraction
S: "sigh" out gently with every breath
T: "trust" your body: you can give birth!
U: "understand" the treatment being offered. It helps you feel more motivated
V: "visit" the toilet regularly, as a full bladder will slow your labour
W: "walk" around to ease aches and pains and bring on contractions
X: more kisses!
Y: "yell", loud and long, and then try to get back into a good breathing pattern
Z: "zzzzzzz", doze off between contractions to conserve energy

Source: http://www.babycentre.co.uk/a1048796/a-z-of-pain-relief#ixzz2OmOmeuci