It might go to supplemental index when:

1. Content is not unique.
2. No content at all or with very little content.
3. You have pages, not determined to have content initially, such as sitemap, contact, Terms and Conditions, etc.
4. Pages that don’t have titles/meta descriptions or have duplicate ones.

Try to re-purpose your article. For example you can make an infographic out of your original article. Then you can make a Google+ submission. Then you can make a video slideshow out of this infographic and submit it to YouTube. Then you can create a poll or a survey at the end of your article and convert the answers you get into a new post on your website.

Better invest in your own website than in other people's sites.

You are welcome.

Here is what I found for you:

http://www.casedetails.com/2011/02/10/what%E2%80%99s-the-right-number-of-outbound-links/

I regularly see pages with tons of outbound links that have much trust. However, in your case, I would recommend to focus more on your visitors' impression. CTR and time on site are also important. If your site is cluttered with links - they will feel confused and leave.

1. your site should have a very simple, tree-like structure

2. your visitors should get to the product page in 3 or less clicks

3. you don't want to have tons of links of product pages on your main page, see #1

4. the more pages with unique content you have - the better

5. the bigger the page - the slower the loading speed. Keep that in mind, you want as fast loading pages as possible.

6. for the rest - use common sense. Imagine you are a visitor of your website. Do you like what you see?

I have never heard of anything bad connected with affiliate links.

I have seen at least 2 websites that use affiliate marketing and they are doing good.

1. <cite>www.undergroundtraininglab.com/</cite>
2. <cite>www.ultimatewowguide.com/</cite>

Both these sites even have sitelinks.

1. your site should have a very simple, tree-like structure

2. your visitors should get to the product page in 3 or less clicks

3. you don't want to have tons of links of product pages on your main page, see #1

4. the more pages with unique content you have - the better

5. the bigger the page - the slower the loading speed. Keep that in mind, you want as fast loading pages as possible.

6. for the rest - use common sense. Imagine you are a visitor of your website. Do you like what you see?

Try to re-purpose your article. For example you can make an infographic out of your original article. Then you can make a Google+ submission. Then you can make a video slideshow out of this infographic and submit it to YouTube. Then you can create a poll or a survey at the end of your article and convert the answers you get into a new post on your website.

Better invest in your own website than in other people's sites.