“whatever the cost” I suppose to some folks that might mean “at the expense of others” but that is not how i intended it here.

These steps are solid overall, with some minor room for debate. I personally recommend keeping private goals private unless you need the help of someone, or unless you have the additional goal (conscious or unconscious) of developing social power/credibility by making and keeping public promises, and by displaying your badassness in accomplishing challenging goals. This is a major reason people do triathlons, for example–so they can have bragging rights! “Dude–you did the Ironman?! Holy ****!”

Sharing your goals with others also has multiple potential drawbacks, depending on when and how you do it. You can receive criticism when you can't integrate it yet, like exposing your seedling to a thunderstorm–best to keep it in the greenhouse until the roots are strong enough. If you fail to achieve your goal you damage your credibility and trust with others in addition to yourself. Sharing your goal is like doubling down–greater risk, greater potential reward too. Like a stage magician, the best goal-achievers only share private goals that they are extremely confident they will achieve but that look impressive to others. I don't necessarily recommend this, but I do suggest keeping the bigger risks private unless they are goals that include others' participation.

You mentioned sharing with people you are intimate with and not say posting it on your blog or telling strangers, but I've found that all the potential drawbacks still apply.

Step 7 isn't necessarily true. One can work through many inner blocks privately. But yes, proper support, well-timed, can be extremely helpful in discovering and dissolving obstacles to achieving one's outcomes.

I'd also add that achievement “whatever the cost” can be deadly–as we've seen in the James Arthur Ray sweat lodge deaths. Do a careful cost-benefit analysis, account for hazards and dangers, and then proceed full-bore…patiently and persistently.