This board doesn't get a ton of traffic but I know I checked it out when I decided to try a VBAC.
1) get a supportive doctor who is 100% on board. If you can't find one be an advocate for yourself and find one who will at least allow you to try if they won't encourage it. My OB said he only wouldn't let me try if the incision was wrong or if there were complications.
2) get a doula. Ours was so good at coaching me to just stay strong and that prevented labor from stalling. I didn't take any meds and I didn't rest. I think that made a difference.
3) last time I was GBS+. To avoid being tethered to an IV I tried what was recommended - probiotic supplements, garlic supplements and a yogurt every day. Was negative this time - of course this could be coincidence but it didn't hurt to do any of those things!
4) last time my water broke and I had trouble progressing. To avoid water breakage I ate lots of eggs and took a vitamin c tablet. I also followed the advice of eating dates to encourage dialation and in labor I went from 1 cm to 7 cm in about two hours. Water broke once I got to 7 cm.
I also got lucky with a very supportive hospital- unless you have pre-eclampsia or the wrong incision you should go for it!!