Keep watching and make sure you understand the core concepts.
PPFX has put together a nice “starter pack” if you like, for some of the most commonly used tools (as in, used almost daily).
Have a look at his post here: 301 Moved Permanently
So in answer to your question, YES, you MUST know what the USDX is doing. As for CRB and Bonds, (Bond yields specifically) check out Vinsters post here: 301 Moved Permanently
Vinster has summarized (quite nicely) the key points of what you should be looking for when analysing Bond yields. He also included a good explanation of how Bond yields differ from Bond prices and why yields are more important to the FX market.