Question: What are the best things parents can do to stay together and have a happy marriage?

Not stressing about every little thing, stay calm and work together to get through tough times.
Go to marriage counseling or something.
Communicate.
Do things that the other parent wouldn't mind the other parent.
Counseling.
Have trust and love. But if they truly cannot get along, then a divorce could be healthier for the child and both parents.
I don't know, I guess it differs to the situation.
Learn to tough things out and talk about problems. Also, repeating the things that were fun to do before could help to keep them together.
Think on the bright side.
Keep going on dates and having romantic nights to themselves.
Communicate.
Work out their problems.
Talk out problems, and think of kids.
Just work out their problems.
Respect each other's decisions.
Compromise.
Think about the kids and how much this would hurt them and think back when they were young and in "love" (real or not) and say, "You know, I want to be that couple again."
I think that's a personal thing between them considering their circumstances, but I really think they need to put aside more time to be together.
Counseling.
Go to marriage counseling.
They should always put God first and each other second.
Spend time alone together, have something in common other than the children, keep romance alive.
Do little things to show each other they care.
Marriage counseling.
Not fight in front of the children, as least as possible.
Communcation and trust along with love is the key.
Counseling.
Marriage counselor.
Work through their problems and learn to work things out.
Think about their kids and each other.
Do things together.
Make sure they always keep a sense of fun and friendship in their marriage, spend their money wisely, maintain a feeling of companionship.
Talk a lot about everything, good and bad.
Talk about things before they get too extreme. But parents should never stay together "for the kids." No matter how young they are, they can tell when something's wrong. Plus, if the kid finds out that their parents were unhappy and that they just stayed together for the kid, of COURSE the kid's gonna feel some guilt.
Not drink/do drugs, because that could mess things up; stay faithful; be honest; be caring.
Talk about their problems.
Tell each other everything and indulge in themselves as well as others.
Be forgiving and treat each other with love and respect.
SEX.
Respect each other and stay committed.
Keep their vows. Respect each other.
Never try to play devil's advocate in an argument, learn to compromise, and make the marriage feel less like a box keeping them in - don't get overly jealous if a spouse goes out for the night.
Remember you married that person, good and bad traits.
Learn different techniques on how to communicate.
Talk to each other and not bottle it up.
Not sweat little things.
Marriage counseling or get to know your spouse again by talking.
Not have an affair and trust each other.
Agree more often and compromise!
No lies.
Doing stuff together.
Have a date night.
To not get married right away without being very sure you could spend the rest of your life with that person. Also make some time to themselves while the kids are out, such as dinner, movie, beach, etc., just to get away from the daily stress at home.
Remember to work as a team, and keep the whole family's interests at heart. That marriage is about the balance between adapting, and keeping who you are. That in a marriage, sacrifices have to be made - but not just by one person. Prioritize things like your children's happiness - the important things.
Go to a couples group. My parents go to a couples group at church and it's helped them come together and be happier.
Talk.
Be open and honest. No secrets or lies.
Try to work everything out.
Not give up. And do their best always to please their spouse.
Go to marriage counseling. Go to an anger management class. Go on holiday. Spend more time together. Talk about real things that matter without arguing.
Compromise.
I'm not a genius ...
Learn about each other more and don't try and always make it busy, e.g. first engaged, then pregnant, then married ... now what? Don't have kids unless you're sure its gonna work with you two because your kid might be happy with divorced parents but it's always better with ones together and still in love, no matter how cringing.
Try and talk all the problems out, and I believe in 2nd chances.
Love each other.
Get along.
Listen to each other and pay attention.
Marriage counseling.
TALK THINGS OUT, GO TO MARRIAGE COUNSELING, DO SOMETHING BUT THERE ARE MORE WAYS.
Vacation, stay honest, not have money problems, stay in love.
I wouldn't know, I am not a parent.
Discuss things, occasionally date, and if desired, a healthy sex life.
Respect each other.
Why would anyone know that?
I'm only 17, I've never been married but enjoy being selfless.
Communicate: talk about anything and everything. If you got a raise, your spouse should be the first to know. If you barely missed a horrible accident on the highway: tell him/her. Most problems end up mutating later on in life into something completely unavoidable and unpleasant, so it's better to solve something and grow as people -- together. Also, most married couples are doing the same routine over again, and the exciting thrill they once had when they were dating seems to fade because of monotony. So instead of going to the beach with your parents (again), take a road trip to a different beach and try something new -- like learning to surf together. It's all about staying interested in each other and the best thing for that is to learn something new about the person and make some new discoveries by trying something different.