Relationships don’t look like they used to (and that's a good thing). But what does it honestly take to make a modern romance work? As part of Committed, we're exploring partnerships ranging from a textbook marriage between high-school sweethearts to a gay couple creating a life together in the conservative deep South.

If binge-watching Gilmore Girls, Scandal, or The Good Wife has taught us anything, it's that relationships are messy. Personal experience proves it too: From our eighth-grade romance to our most recent breakup drama, "love isn't easy" is a life lesson we know all too well.

No matter your status—single, dating, engaged, or married—relationships take work. And whether they end with tears and empty Ben & Jerry's or last until forever may depend upon countless factors, but your own actions, words, and thoughts undoubtedly play a role.

One thing that'll give you an advantage in the game of love? Soaking up all the wisdom you can from relationship therapists, researchers, matchmakers, and more. Here, we've distilled it down to the very best advice 15 experts have learned. Regardless of your personal situation, their words may help you uncover the key to long-lasting happiness.

1. Do or say something daily to show your appreciation.