This is all planning as DS is only 3.5 months old:
To listen. Just at all. Communicate with DS as if his opinions, although not always reasonable, are valuable to consider. I would never open a letter DC had desperately written and left for me to try and communicate with me, then completely ignore its existence.
To applaud my DS's interests and achievements even when they don't align with my specific desires for him.
To not HAVE specific desires for him, let him be free to become his own person, even if that means he doesn't become a doctor and I can't impress people with my boasting about him.
To not obstruct a relationship between my DS and DP, even if things sour between us, unless I reasoned that DP was a genuine threat. Especially to not create awful lies to facilitate such an obstruction and satsify my own bitterness.
I'd like DS to respect women too, although it's a different dynamic at play...my mum encouraged some serious female competitiveness.
No violence. It's not okay to slap or hit your child around the face just because you don't know how to deal with your frustration/issues.
No getting falling-down, unintelligibly drunk around DS, especially if ever in sole charge of him and he's too young to even understand inebriation and thinks I'm ill/dying.
I wouldn't leave DS crying himself to sleep because he's in a different place and mummy is with somebody who isn't daddy, while I was in the next room with my boyfriend.
I wouldn't avoid explaining simple biological functions and sex to a curious DS by making things up (e.g, menstrual blood soaked through on her jeans came from "sitting on broken glass") or saying, "I don't know". Behaving as if sex is a bit shameful and something DS shouldn't even consider until he's in his twenties...and then, upon finding out he's not a virgin, act as if I'm very broad-minded and start talking about my own sex life.
Establish boundaries but don't overprotect - small steps of independance like walking to the shop at the age of eleven are important stepping stones into adulthood and I can't wrap DS in cotton wool for fear of men with sweets on street corners.
I would never open a present DS bought and wrapped for me at Christmas and say, "oh," and toss it aside.