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.
If you have to give yourself a 30 day relationship "challenge" which is comprised of things that should just be given and not even thought twice about, you're doing it wrong. He deserves all of these things everyday, period.
I don't think it's necessarily what to say when marriage is hard, I think they're questions and statements that apply to every day life. Open & honest communication is the key to a great marriage, which I do have :)