Relationship skills like any other skills need to be developed and honed overtime.
Some things that all couples can get better at is showing appreciation and validation. Showing appreciation in small but obvious ways sometimes has the biggest effect...simply being available and present to actually listen and be supportive when you partner has a problem. It's important to not give advice unless you confirm that is what your partner wants or needs. Many times they only need to be heard, not told how to handle things.
Selected excerpt(s) and linked article courtesy of Fatherly. Selected photo courtesy of Flickr/Mo Riza.