With my first I just denied I was in labor until I hit transition and then was so panicked that OH wouldn't make it for the birth or that I wouldn't make it to the hospital that it distracted me. Wouldn't say it was 'relief' though.
With my second, warm water, either in bath or shower was the best relief for me during the first stages of labor. Massage and standing/swaying with OH helped with the next bit, and when I hit transition it just hurt. But was over fast so by the time I decided I needed something, it was time to push.
Hoping to use more water this time, possibly a birthing ball, and trying more positions to see if that brings more relief.
No TENS or G&A available to me, otherwise I'm sure I would have tried them.