Advice for successful unmedicated labor

I had my first over two years ago, and was able to get through labor with just the laughing gas the hospital offers. I was super close to giving in and getting the epidural. For the first half I was able to lay in the tub, which helped a ton but after so long it didn’t do much anymore and same for the laughing gas. I realize going without medication is going to bring pain, obviously. I’m just wondering if any mommas have any advice or tips that made labor a little bit easier to get through without the epidural?