Ask your fiance for a full financial disclosure, and exchange credit reports to get an understanding of each others spending patterns. Talk about when you want to buy a house, how to save for retirement, and what you're willing to sacrifice to reach such goals. Consider separate accounts for guiltless discretionary spending, but keep the bulk of your money jointly. Most do not, and it's a thorny issue to raise for no reason. But consider one if there are kids outside your marriage, you own a business or have significantly more wealth than your partner.
Love knows no bounds.
And neither does a good divorce lawyer.