tindalos (reddit.com)

"Don't argue over money. Don't argue at night. Don't cheat. If you're going to cheat, get a divorce first :P The grass isn't greener on the other side, it's just got different problems. Pay attention to the little things. Listen. Don't be clingy. Don't be distant. Don't talk all the time. Don't disappear for hours at a time. Keep in touch. But keep a little space. Don't keep secrets, but don't spill your guts every day. Be interested even if you aren't, and try to be interesting by compassionately understanding what your SO may or may not care about. Remind yourself every day what got you to this point, and 14 years later you can still be very happy and without any hardships."