A few comments:
First, I appreciate you sharing this, as I am sure there are many trainers on here with similar ideas for blogs, tiwtter, etc in order to give clients more to work with, and to attract more business.
Second, pay attention to who you are writing to. At moments, it is apparent that you are writing to other trainers (e.g. Some might blame the coach, but we all know better than that right?), and others it is obvious that this is intended for clients (e.g. …if you are still too lazy to prepare a shake you should probably just stop reading now).
While you mentioned this in your post on here, good writing always selects one group, even if that group is generalized. You do not want to talk to two specific groups at once, when such groups are highly contrasting.
This applies also to the CONTENT of your post. You are addressing simplistic ideas in a somewhat formulaic way. I must stress, this is not always bad IMO. Formula can be extremely helpful for beginners, as it gives them something to grasp on to. However, since you seem to address coaches specifically, you must understand that no established trainer, or even a coach in training, will learn much from these formulas.
If you are addressing beginners, this is a fine post for that purpose, and I meant no offense.
I, personally, appreciate honest criticism, and hope mine was helpful.
All the best with your training.