Enjoy, Lozza!
Just wanted to add a few notes about the breathing techniques I've picked up...
Start by being completely comfortable and supported, and have your OH/birth partner see that you're not disturbed during waves/contractions (I'm supposed to call them waves, sorry, it sounds goofy even to me, LOL).
Relax your jaw by putting your tongue behind your upper teeth. Also, try breathing out a couple of times with a horse lip-flapping noise. This will relax not only your jaw but your pelvis, too. (You can move your tongue once your jaw is relaxed.)
Breathe in (through your nose) to the count of 4, hold it for a second, and then breathe out (through your mouth) counting backwards down from 8. It seems like a long time, but I've found that I can actually breathe out to the count of 15 now. I sometimes use the rhythm of my breath to count. Sometimes I breathe out through my nose, if I feel like it, or inhale through my mouth if I want more air, but then I get back to my rhythm.
I used to run and I always found getting a breathing rhythm to be amazingly calming.
Somewhere I read recently to think of breathing in with your diaphragm rather than into your belly. Your diaphragm is like a parachute that supports your lungs, so try to imagine that whole area rising up as you inhale. For me that works better than trying to fill my belly with air. Especially as my belly is currently filled up with baby.
Close your eyes and think of a word that relaxes you. Repeat it slowly in rhythm with your breathing. Also, use Emera's visualization exercise that she posted about a while back--walking down a hill or stairs to a place where you feel very safe, calm, relaxed, and surrounded by things and/or people you love.
Have your OH learn a cue word and/or physical cue that will help bring you back to relaxation if you're starting to get distracted from your breathing.
You know how, when you're exercising, sometimes you wish you had someone standing next to you and saying, "Pull your core in!" every so often? That's how I see my DH's role during birth. I'm going to make him a list of things he can do or say to relax me, and then narrow the list down if necessary.
Also have some kind of cue that means "no, thanks" if something is not working for you, like if you want your OH to back the hell off of you
, you can just use that cue and not have to worry about hurting his feelings.
Of course, how all of this works in context of the actual birth process remains to be seen. But it's been really great having it all to practice in the run-up!