Psychologist Eli Finkel studied and worked with couples for 4 decades and wrote a whole book about how to make it work. But if you don't have time to read The All-Or-Nothing Marriage, he's got some love hacks. A love hack, as Dr. Finkel defines it, is a proven technique that takes little time or effort and doesn’t even require cooperation from your partner. “It’s a quick-and-dirty option that can take just a few minutes a month,” he says. “It’s not going to give you a great marriage, but it can certainly improve things.
1. Touch your partner
Holding hands can win you points even when you don’t mean it
2. Don't jump to bad conclusions
If your partner does something wrong, like not returning a phone call, don’t over-interpret it
3. Picture a fight from the outside
Think about the disagreement with your partner from the perspective of a neutral third party who wants the best for all involved
4. Make a Gratitude list
Once a week, write down a few things your partner has done to “invest in the relationship
5. Accept a compliment
One of the most common factors in failed marriages is the “rejection sensitivity” of one partner. People with low self-esteem have a hard time believing their partner really loves them, so they often preemptively discount their partner’s affection in order to avoid being hurt
6. Celebrate small victories
When your partner tells you about something that went right in his or her day, get excited about it
There's a lot more to these hacks here. Or take the time and read dude's book.