Need help posting articles on BMR

Hi all,
I am a newbie in IM, I just started my first affiliate website about a fitness workout program, I heard a about a service which is BMR, where you can write posts with your backlink and submit them to their high PR network so that the backlinks get indexed fast. I would like to write posts on a daily basis so that I could get most use of the service

I previously posted an article to ezine articles but it was a bit hard for me writing 400 words for my product. The problem is I actually don't know what to write my website has a lot of info there, and to write unique content every time on the same product is very hard.

I know I can outsource but the point is this a bit over my budget, and since I am new I would like to try to make things by myself.

So my question are:

1. Do you think I should write about a broader topic like fitness and then include my link of my product at the end?


2. Where do you think I could get ideas from to write different posts each day ?

3. Is 150 words/ post is good or should I write more?

4. Should I consider that posting on BMR is used for increasing PR, and getting backilnks, or do you get traffic from these posts as well?

5. If I got the right ideas, what do you think in average it takes to write 150 words?

6. Do you think writing 1 post/day is good for a new website targeting a medium competitive keyword, or should I write more than one?

I know that my question are a lot and stupid , you don't have to answer all of these but any advises will be highly appreciated

Thanks