Bible Question!

I've been reading a lot about meditation and how that helps your prayer life because it causes you to respond to the truth you are reading. So this morning I decided to try it and of course I don't fully understand the verse!!
"I said to Yahweh, "You are my Lord; I have nothing good besides You."" Psalm 16:2 HCSB

"I said to the LORD, "You are my Lord; apart from you I have no good thing." Psalm 16:2 NIV

What does this verse mean? Does it mean that I have absolutely NOTHING good apart from God? Or does it mean that the only good things I have come from God. For example, I consider my family a very good thing. In response to this verse, should they be nothing compared to how I view God? Does that make sense? I'm really interested to see what ya'll have to say!