I got this song from Staind-Online, it's an scoustic live version of it from a Boston show. This song is actually a bonus song, if you bought 14 Shades Of Grey you can go to Staind.com and check the song out. 

Staind - Let It Out
Standard Tuning

Intro/Verse:

E -----------------|-----------------|-----------------|-----------------|
B ---3-----3-----3-|---3-----3-----3-|---3-----3-----3-|---3-----3-----3-|
G -----0-----0-----|-----0-----0-----|-----0-----0-----|-----0-----0-----|
D -----------------|-----------------|-----------------|-----------------|
A -2-----2-----2---|-3-----3-----3---|-----------------|-----------------|
E -----------------|-----------------|-2-----2-----2---|-3-----3-----3---|

Chorus: Em - Bm - C - G

That's pretty much it... pretty easy song.