At the ripe old age of 34 my advice is:
Don't take yourself too seriously
Learn to control the gate between your brain and your mouth/keyboard
Regarding faith/mood; life isn't meant to be even all the time. We have highs, we have lows. Sometimes we feel downright awful and hostile toward God. Declaring that hatred toward God openly hurts you, not God. Faith isn't about what you feel. Faith is just moving in one direction, or choosing to stand in place when everything in your body wants to run away. You don't always feel it. I don't think we are meant to. Sometimes we feel very zealous, and are tempted to be hyperdox. Both ends of the spectrum are unhealthy.
I am still young in Orthodoxy. I have hardly mastered the advice I give above. But I am working on it.