Let everything that has breath praise the LORD!

Let everything that has breath praise the LORD. Praise the LORD!  Psalm 150:6

Psalm 150 is most instructive about worship:

Who to Worship?

v.1a Praise the LORD!
[God and only God!]

Where?

v.1b Praise God in His sanctuary; Praise Him in His mighty firmament!  
[Everywhere.]

For What?

v.2 Praise Him for His mighty acts; Praise Him according to His excellent greatness! 
[For all He does, and for Who He is.]

How?

v.3-5 Praise Him with the sound of the trumpet; Praise Him with the lute and harp! 4 Praise Him with the timbrel and dance; Praise Him with stringed instruments and flutes! 5 Praise Him with loud cymbals; Praise Him with clashing cymbals!  
[With all kinds of instruments, reverently, yes.  And also with exuberance!]

Who is to worship God?

v.6 Let everything that has breath praise the LORD. Praise the LORD!  
[Everyone and everything that breaths!]