What tips are there for marriage to survive forever?

cheat a lot, keep things spicy in the bedroom ,never call her your bitch ,never forget her birthday, get her a pet, 😛

Respect , communication, love , honesty , passion ,sex, affection and space as needed

Sounds like a cake recipe but you get it

Patience and space.
Good communication and curiosity.
Loyalty and attraction.
So many things...

Communication, loyalty, don't cheat, be willing to tolerate each other at your worst, don't cheat.

Distance makes the heart grow fonder so marry her and then mail her to Antartica

Forever is a long time. It helps if you actually like the person you are married to.

Two words "Yes Dear".
But you have to make them sound sincere or all will be lost.

Communication, honesty, kindness, respect

Practice POLYANDRY...