Interestingly, Psalm 73 has been my favourite Psalm for a while (among just a few Psalms that I thought I understood anyways), but it was only recent that, through listening to the Sons of Korah singing Psalm 73, I realised that I liked it for a wrong reason. You see, I liked the Psalm because in its beginning part, the psalmist shows his jealousy over other wicked, yet prospering people and brings his case against God. I really liked that part because I could totally relate to the psalmist. However, in their music, Sons of Korah only sings the later part of the Psalm where the Psalmist praises and claims the truth about God and His reality. I was initially disappointed about it, but as I kept on listening, I started understanding the real message of the Psalm, which is a joyful repentance before and towards God once he encounters God's majestic glory in the santuary.
Here's what Sons of Korah themselves had to say about the Psalm 73:
Psalm 73 represents possibly one of the most important spiritual breakthroughs portrayed in the psalms. The writer has an experience which is similar to that of Job and Habakkuk. If we can understand this movement, if we can grasp the point where the writer arrives by the last section of this psalm (which is the section we have recorded) in contrast to where he begins, then we have understood the essence of biblical spirituality.
But the most important thing [the Psalmist] had be senseless and ignorant to was this: He had not realised to any extent of what God had given him. He had expected to see God’s goodness manifest in such shallow materialistic ways and yet such things are incomparable with what he now sees before him. It seems that at this moment, as he waits in the presence of God, he sees what his portion in life really is. It is God.
Read the whole thing at their site (once at their site, click on STUDY section to see different Psalms explained), and I recommend you to buy their CD's and listen to them. It'll help you meditate on Psalms.