"Don't sweat the small stuff, its all small stuff". I think the best I can offer is if you disagree on something, sit down and talk about it, if it means a lot to one of you, the other can give in --of course this goes both ways.
With myself and DH (married 45 years by the way) that is always the way we settle things. We have actually listed on paper the why's of doing (or getting) something. Its always been a shared decision on the BIG stuff, and we have never sweated the small stuff. Example: who ever empties the tissue roll can put the new one on any direction they want. Gets to be a game after a while--oh yes and always laugh together. We have always made a habit of, at minimum, having a long hug at least once a day, and always saying "I love you" first thing in the morning and last thing at night.
A wise older woman (she was at least 85 and I was a new bride)gave me some advice. She said "Honey you go downtown and buy the prettiest nightie in the store, then put it on the chair by the bed in case of fire". I was about 20 at the time and about died in place right there. grin.