So, DH and I had an interesting (OK, these things are subjective...) conversation last night when he said he thought it was a good idea to let DD (nearly 3) make some more decisions for herself, have more flexibility in her routine etc, now that she is no longer a completely irrational toddler type. (She is still perfectly capable of the odd bonkers tantrum of course, but they're getting less mad and she's starting to appear much more capable of reason.)
This led us to thinking about what we thought it was worth being firm on, which mostly came down to the bleeding obvious (such as road safety, no hitting, etc), and also to not running around at mealtimes and thus not eating, and going to bed in good time - largely because she is a fiend if she is hungry/tired.
Is there anything to add to my list? or things that you thought were important but now think perhaps it wasn't worth going into conflict over?