1 - It is not always money's fault when a band get worse.
2 - Do not be the "true defender" guy that says "every bands' best album is the one released when they weren't still famous".
3 - Write CDs' merits.
4 - Avoid personal and subjective opinions or personal experiences on the band.
5 - "It's shit" does NOT exist in a decent review.
6 - When you write, do NOT tell band's history, use the space you have to actually review the CD and do NOT write, in the last 2 lines, "it's a bad CD".