Tip Number One.
You should always be honest with each other. Always. Honesty is one of the most important components of a healthy happy marriage.
Me: Honey, would you support me if I wanted to try out for American Idol?
Me: Why not?
Mark: Because you can't sing.
Me: But what if I really really wanted to? What if it was my life's dream? Would you go with me and cheer me on?
Me: What if I said screw you, I'm going to anyway? To fulfill my dream.
Mark: I'd punch you in the throat so you'd be incapable of singing and therefore unable to humiliate yourself.
Me: Awww, you'd really do that for me?
Mark: I would.
Me: I love you.
Honesty. It's the best policy.
A successful marriage requires falling in love many times, always with the same person. ~Mignon McLaughlin, The Second Neurotic's Notebook, 1966