Separate banking accounts. From past experience and from friends. It seems most "discussions" happen around finances. If each has there own spending money, after the other bills are paid, then if she buys a dress or you buy a new golf club it isn't a debate.
god I wish I would have taken this advice a while ago. We combined accounts about 3 months ago. Imagine my bank account as a bucket. It used to be a strong bucket, very reliable and sound... now it has a gaping hole in it, and water is leaking from it fast than it came in
we have had some talks, but as she is still in school, she doesnt really have the best grasp on what it means to have "limited resources" yet