The best advice I can give to help you sail through this pattern is as follows.
I wrote down a simplified description of each cable on post-it notes as I executed each cable for the first time. (I ticked each one off on the pattern as I wrote them out to save searching through the post-its to see if I was doubling up.)

It was less painful to write them as I came to them as opposed to writing them all out at once.

By doing this I was able to read ahead a few rows and have only the post-its relating to these rows in front of me. Doing this made it a TV knit!!!!

Chart B
For a neater edge around the centre square, when it says to K2tog after a wrap in chart B, knit the K2tog through the back loop.

Likewise in chart C, when it says to P2tog through the back loop after a wrap, DON’T, simply P2tog normally. Pay special attention to picking up the purl wraps below.

Here’s how to pick up the purl and knit wraps correctly:
https://www.youtube.com/watch?v=iiyz8aClRWU

I picked up the stitches all the way around the blanket and did 18 rows of garter stitch (in the round) and mitred the corners.

I followed deimne’s notes on converting this pattern into a baby blanket:
http://www.ravelry.com/projects/deimne/morvarch

I blanket stitched a jersey fabric to the back.

I hope you found these notes helpful.