1. Reduce the use of barrels. I must admit it makes sense in the fight for the grove as a defender (up to a point, of course).
2. Only use scrolls that can be cast by the character as per the 5e rules (that's where I am the most strict as I do find it a bit annoying)
3. Try not to cast two spells in one round (cantrip + a spell is ok).
4. Minimize reloads (mostly at full party wipes or where I have done something that the character would not typically do)
5. Untypical things done by the NPCs are to be avoided
6. When I do not use my main for dialogue options, I try to follow the beliefs and manners of the character talking.
semi-7. When playing as a wild mage, I always try to cast the spells where there are few allies around. In the presence of barrels nearby, either move away or do not cast spells from 1st level and higher.

I was kind of opposed of the push but then again if the enemy uses it, then I should, too. That being said, shove would work best as a standard action.
I am not overly strict with most of the rules but I do try to minimize the behaviour.