Everyone walks down the aisle dreaming of their happily ever after, but maintaining a happy marriage is often easier said than done.

A Reddit thread emerged Wednesday asking couples who have been married 10 or more years to reveal their secrets to wedded bliss -- and who better to dole out advice than those who have experienced it first hand?

We combed through hundreds of their comments to bring you 21 rock-solid pieces of advice. Check them out below:

4. Communication is key.
"[Married] 20 years ... talk, talk it all out, be open. Are you unhappy about something? Talk about it."