Kelsey Ogletree, for Real Simple advises understanding each other values, having the money talk, and meeting each others favorite people, and taking a major trip together.
(https://www.realsimple.com/)
A Chicago based counseling center, Couples Counseling Now, advises couples to keep in mind that the things that make LGBTQ relationships work are the same things that make any relationships work: attention to the relationship, a healthy intimacy and sex life, kindness, respect, communication, compromise, trust, and safety.
Remember, it’s the positive habits we develop that guarantee us success in all areas of our lives.
Another piece of advice from the Navy writing team:
LEARN SOMETHING NEW TOGETHER!
Yes, find something you both can learn together and practice together. Something you can practice throughout the many years and something you both enjoy.
Be intentional with being in the relationship, and take that intentionality into the marriage. Don't become relaxed in a routine of a relationship. Stay spontaneous, stay romantic, stay curious about one another.
Don't treat marriage like the finish line, but the starting line.