Mistake 1: Not Dealing With Debt--Money is the No. 1 thing couples fight about. Fess up about your personal debt and set up a financial game plan.
Mistake 2: Alienating Your Friends--Friends are key for a successful marriage, so tag along on those girls' nights out. Just because you're not guy-hunting doesn't mean you can't be a supportive wingwoman.
Mistake 3: Not Having Enough Sex--Over 60 percent of newlyweds are already in a sex rut! You're busy, but that's not a good enough excuse not to get busy. Initiate sex, even if you don't feel like it or have to schedule it. If you get in the habit of having it, you'll start wanting it more.
Mistake 4: Letting Yourself Go--So you put on the "newlywed nine." Big whoop, you've already found your mate, right? Wrong! Make a plan to get fit together or at least respect each other's goals.
Mistake 5: Outlawing the In-Laws--Fifty percent of couples have a problematic relationship with their in-laws, Manage expectations, like saying you'll call on Sundays so his mom doesn't guilt-trip you for ignoring her weekday messages. Even if your spouse is bitching about his family, resist the urge to chime in. It'll bite you in the butt later.
Mistake 6: Crazy Fighting--Getting hitched isn't a free pass to hit below the belt. When you're getting really heated, walk away to cool down for a few minutes.
Mistake 7: Becoming Baby-Obsessed--It's easy to fixate on that next big step, but chill out -- the average couple has a kid within three years of marriage. So why rush? Savor the moments now and get ready for waking up for a 4 a.m. feeding.