My wife and I are still newly weds.....33 years! Is that possible? I'm still learning, but here's a few thoughts.
1) For us DIVORCE IS NOT AN OPTION. ( Murder, maybe, but divorce, never) Individually we each have a very strong faith in God and His plan. No sermon here.
2) Popular culture expectations are impossible. The idea seemingly presented by our culture is one of never-ending-bliss. Reality is that all people are messed up, and will continue to disapoint. Therefore have reasonable expectations.
3) Always resolve conflict. Some people say to resolve it before going to sleep. Well, we've bent that a bit. we've had a few very silent days over our 33 years together, but eventually we always talk it out.
4) Realize you can't change anyone else. You can only change yourself.
5) Marriage is not 2 people each giving 50% as is often portrayed. It is 2 people each giving 100% to their mate.