I'm not sure if anyone on here is a Christian, but there are a lot of songs I've found recently that I have adopted as my "power songs."
Josh Wilson - "Carry Me" (He actually struggles with anxiety disorder and this song is specifically about it.)
Mandisa - "Overcomer"
Francesca Battistelli - "Strangely Dim"
Other non-Christian songs I like are:
Danny Gokey "My Best Days (Are Ahead of Me)"
Imagine Dragons "On Top Of the World" & "Underdog"
Jack's Mannequin "Dark Blue"
John Mayer "New Deep" "Walt Grace's Submarine Test, January 1967"
Tom Petty - Free Fallin'
And tons of other that I can't think of at the moment.
Pretty much any song with an upbeat, "happy" feel to it that makes me feel a lot more present in the moment!