What have you done to achieve optimal fetal positioning?

I have had a look at the spinning babies website, but haven't really tried any positions yet.

i am 29 weeks pregnant today, and bub is currently lying sidewards. I know there is heaps of time to move, but i'd like to know the best type of things i can do.

My DD was also born face up, so if possible i would like to also avoid a posterior labour this time.

I know that slouching is not recomended and sitting up straight is better- but i'm not finding the 'correct' positions comfy. Is this normal, and i just have to suck it up, in order to give bub the best chance of optimal positioning?

Love to hear your thoughts or be directed to places where i can read up (preferably in layman's language).

ta