Above all else, guard your heart!

I think this is great advice we find in Proverbs 4:23-27.  I find the advice that follows the first sentence helpful:

1.  Think about and control what you say.
2.  Think about and control what you see.
3.  Think about and control where you go.

In other words, what we say, what we see and where we go all impact our spiritual heart health.