Prodromal labor here as well - though its infrequent which days it tends to haunt me.
I had a feeling, which was confirmed yesterday, that baby was posterior. My body is completely ready to birth this child, but his position is not optimal.
Today, I was going to go on a very long walk, but my toddler seems to have a bug of sorts.
I ended up switching my LO into a good position this afternoon by watching a movie on my hands and knees with my tot.
A friend found this site to help me out, http://www.homebirth.org.uk/ofp.htm
- and it has some advice on how to keep baby from being posterior, and how to change him from a posterior position.
When my LO turned (he turned back a few hours ago, while I was napping,) it took a lot of uncomfortable pressure off of my perineum - pressure that felt misguided and not productive.
Now that I know he can/will turn, I feel a lot better.
I recommend trying to turn your LO, it can't hurt to try - and it very well may help bring him/her down, and end that backlabor/prodromal labor.
Good luck, hth.