First please have a look at my proof (I remember my feeling when I saw that )
I didn't go for a high gravity products because they have a lot of competitors.I went for a very new product.It's about a guide about how to cure a skin problem.Then I started researching for keywords and luckily I found 3 keywords related to my product and they have high searches (low competitor too).
Then I go to fiverr, hire a girl to make me a testimonial video.But I need my video has HD quality, 2 mins long and she write script for me so I paid her total 15$ for that.After 3 days,I receive my video (it took longer than she said because her internet connection was bad at that time). My video look great, high quality, good script and last more than 2 mins so I'm satisfied.
Then I uploaded my video to Youtube with catching title, my aff link at the first sentence of the description and a good description too.I add 3 main keywords to tag and some longtail keywords revelance to my niche (so many tags as many as I can put).I cloak my hop link with ow.ly because bit.ly doesn't allow to shorten CB hop link
As soon as my video uploaded, I bought 10k views from a guy for 10$ and he over delivered so I got 15k views next day.I also give it some likes and favourite by using u2bviews (it's slow so I just hit some likes & favourite but it's worth).I also ping my video link with ping-o-matic.That's all I did for my video, no more link building.
The next days after, I went to yahoo answer and search for my keywords to find related questions (I filter options that Open questions & asked less 7 days).Then I answer them and put my youtube video link at the source box
Luckily one of my answers was choosen to be the best answer and my video rank at first page of youtube and google (for some long tail keywords)
And bump, at 23 July, I log in to my CB account and saw my first sale,I think you know my feeling at that time
I invested 25$ and made 26$ lol.But I made a lot of sale in August so my ROI is good
Hope this help beginner to start with CB