This Psalm teaches us that God created everthing on this earth. He created everything we see, hear, smell, touch, and taste.
God created us in His image and we should be a represented of Him, by uplifting and praising his name all the time. Not some of the time but all the time. We should strive everyday to do God wills even when we are down, or don't feel well. Not just when things are going great.
This Psalm teaches us that Christ was sent here in the flesh, so that He could die on the cross for our sins, that we can come to God ourselves and ask for forgiveness.
As stated earlier our responsibilties is to praise, worship, uplift Gods name in season and out of season, which means not only we are happy because things are going our way, but in times we things are definately not going our way.