Build 10x permanent backlinks to the product:
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from a related site, preferably with a short comment about your "experience" there
Link could be on your page, blog, facebook, twitter,youtube ...
All your sites need to be PR7-PR9.
How to prove you done it:
Link to where I can see the active link
We truly believe in Commitment, sincerity, reliability, long term relationship and Excellence. Willing to start your work right away. Please send me details in PMB. Thanks