Visualisation meditations are great, I found. I had DS in the birth centre and laboured entirely at home and visualised how I would be a lot. It was very zen, in the end. For DD I knew it would be about the same, but with no getting into a car!
I set up my space, I wrote out a plan for myself for what I would do - get the oil vaporiser going, light certain candles, turn on my salt lamps and play a special playlist I had prepared and was listening to in the last trimester especially.
I really recommend spending some quiet time listening to Deva Premal and the mantras. I found them very centreing, and rather than considering them to be invocations to any deities, I used them to focus my thoughts - rhythmic cues for thoughts and visualisations I wanted to have. By the time I was labouring I had the music going and it reminded me of what I wanted for myself, for the labour and the birth. I can still hear the music and the very zen feeling in the house. The architecture of the music, for want of another way to describe it, lends itself to introspection and measuring your physiology. I knew the songs by the labour and could hum along to them, and that was good for regulating my breathing. I downloaded the lyrics to the mantras (turns out they are about 1-3 lines repeated!) so that I could follow vocally if I wanted, but in the end humming to the melody did the trick.
I found that the humming or singing of the mantras seemed to activate different areas of my mind and body, so my self-perception was heightened and I could really go into myself.
Importantly, the music set the mood for everyone - I had my DS, DP, two midwives and a GF (helping with DS as well as supporting us) - and had us all on the same page.
I was also moving furniture around in the last few days, getting the balance 'just so' It was a teeny house and we had a trial run of the birth pool filling, which was fun.
I bought a happy flag and told DS that he was to stick it in the ground near the letterbox after the baby was born, so he felt like he had an important role the next day