J.O.
epidural!
have someone there with you who you trust and can be yourself around. I had my husband there. whoever is there should be someone who will take orders from you if you give them, and should be someone you will listen to and follow instructions from if you get to where you need that.
don't let the staff push you around. be insistent about what you want.
once you find something that works, stick with it. I found that yelling "IT HURTS!" over and over again at the top of my lungs was the only way to keep on top of the pain until the drugs arrived. I also found that I didn't want sympathy from anyone while I was yelling.
Forget all the stuff you learned in birthing class, if you took one. We didn't use any of it. Any old breathing is fine if you want to use breathing as a technique. The key is to focus on the breathing instead of the pain. Works well in the early stages.
When they tell you how to push, do it exactly as they say. Sounds gross when they say to push like you're pooping, but it really does speed things up a lot. Makes it a lot easier. (Sorry for the gross factor, but I think it's important to not fight your own body being squeamish during delivery!)
Hope that helps. But I know you will do fine!
Hugs and mental support,
jen