Advice for the new bride

I'm going to a bridal shower tonight, and I know they will ask everyone to write down one piece of advice for the bride-to-be.
I've been thinking about this a lot this afternoon, and what I've thought about has brought tears to my eyes. The truth Heavenly Father has taught me about marriage and His plan for families has enriched my life so much. The happiness I've found through His plan is beyond description. It supports me through the heartbreaking moments, calms me during the hot rushes of anger, gives me energy for just one more step when I'm dead tired on my feet.
What will I tell this new bride? She's really young, barely 19, but a faithful, virtuous young woman who is putting her trust in God's love and in His plan for her life as a wife and, someday, as a mother. She has a wonderful, strong, supportive fiance with good common sense, mature, loving. He's definitely Mr. Right for her.
Things seem to be so right for this sweet young woman, happening at the right time with the right person, for all the right reasons.
So what could I tell her?
8 years ago I was in her shoes-- getting married to my Mr. Right, everything in my life was perfect. But no one knows for sure what happens once your Happily Ever After comes. Someone once said that after Happy Ever After happens, True Love begins. I completely believe that. True Love that grows from the day-to-day grind of working 40+ hours a week, knowing that you're doing it because you love your family. True Love that grows from nursing all 3 kids through ear infections, strep throat, fevers and stomach bugs all at the same time. True Love that grows as your husband struggles through a layoff and unemployment. True Love that comes out of betrayal, repentance and forgiveness.
What will I tell her?
Marriages that are started and built on God's foundation of faith in and obedience to Him can be SO powerful. I wish more women realized that. I think I'll tell her that.
I've learned that spouses need to be fiercely devoted to one another, no matter what happens. I think this principle would change so many marriages and families. Not to excuse, ignore, or defend your husband's faults and mistakes, but to love and encourage him DESPITE those stumblings. To encourage him to be his best. To be his cheerleader. Yeah, I think I'll tell her that, too.
I'm really excited for her. It's almost like me getting to relive everything 8 years ago. The butterflies in the tummy, the dreamy looks into his eyes, the giddy shrieks when you're by yourself. Yeah, I'm totally reliving it all. And what a blessing to remember all those great moments today, as I scrub down the kitchen, mediate in my children's arguments with each other, try AGAIN to teach my 2 year old about colors (No, honey, the banana is YELLOW, not blue), and the age-old question of What can I make for dinner? (Well, since I scrubbed out the fridge, I have a better idea now of what's in there :) Remembering those exquisitely happy moments that started this whole life helps me feel better about the things I do today, and the reasons I do them.
How could I ever convey all of this to this new bride-to-be? The answer is simple. I can't. So much of this life is meant to be learned as we go, holding God's hand through it all. That makes everything more precious, and worth every step.