3. Ideas of cleanliness. Each person has their own way of being clean and organized and rarely do two people share the exact same ideas and habits. If you are considering living together, make sure your partner is clear about your vision of cleanliness and fairness around chores.
Believe it or not, chores break up more marriages than major life disasters. Couples can make it through tragedies better than they can make it through arguments of who did the dishes last. If you and your partner vary greatly on chores, get a cleaning person to come in weekly or bi-weekly to balance out your differences is one solution.
Another great way to balance out chores is to make them fun and to do them together at the time they need to be done. The majority of conflict comes when one partner leaves chores for "later." Get them done and move the conflict out of the way.
4. Discuss finances. It is important to be clear on your partner's finances and that they are clear on yours. Money is a major issue that comes between married couples. Couples need to make decisions on how the money will be spent and agreements need to be made based upon equality.
Each partner should pay an equal percentage of their respective income on bills. Therefore, if one partner earns more than the other then that partner will contribute slightly more. To try and split everything down the middle when incomes are not the same doesn't typically work out fairly so base your finances on percentages of income instead.
5. Time Together. Bizarrely enough, living together can actually create less time together. When you do not live together you are focused on any time you can get with each other which creates an effort to plan time, plan dates and plan fun activities together. Living Together Before Marriage: Is It A Good Idea?