The biggest communication problem is we do not listen to understand. We listen to reply. Learning how to listen means visting another world and speaking their language, putting our discomfort aside. Imago therapy is best for learning how.
Treat people how you want to be treated, especially if you claim you love them. If you can't treat someone with the most basic human dignity and respect, you aren't ready to get married. Get the best tips and how to have strong marriage/relationship here:
You can never share too many appreciations with your partner. We start every one of our marriage counseling sessions with couples sharing an appreciation with each other. Keeping things positive prevents crises and marriage problems down the line.