My little one has just turned 2 so there's no major rules as such yet.
In saying that, there's probably more than I'm aware of.
Keep out of the kitchen when I'm cooking.
Bedroom toys back in toybox before coming for breakfast.
Please's, thank you's and pardons.
All food to be eaten at the table.
No climbing.
No touching (lots of things)
Shouting and running around like a loon is for outside, not inside.
Lots of kisses and cuddles before bed.
Most of it works without question. He knows not to touch anything that isn't 'his' and toys belong in boxes when not playing anymore. Learning manners are an ongoing thing.... he mostly remembers but there are occasions I need to remind him which I don't worry about at his age.
Ummm the running is probably the hardest for him to grasp. Well, he does grasp it but he's obviously sometimes so full of energy he doesn't seem to be able to help it (so I let it slide to the point where it seems he's losing control and about to go head first into something).
We go out nearly every day for him to be able to run and burn energy so I do expect that the couple of hours before bed should be calmer.