Would absolutely recommend both the TENS machine and Hypnobirthing.
I used the TENS machine this time, it was a godsend. Seriously. Amd it only cost me $25 off ebay. Wish I had used one for all my previous births.

As for the hypnobirthing. I have never had classes or even really looked into it. But after this last labour I got talking to my midwife (who runs hypnobirthing classes) and apparently that is pretty much what I have been doing throughout my labours.