I have worked to promote products as well as services based websites.
My Category Work:-
*Directory Submission.
*Forum profile Building
*Forum Post.
*Social Bookmarking
*Blog Comments.
*Article Submission.
*Blog Creation
My techniques:-
*Always Apply White hat method
*Linking with high pr
*Always apply do follow links
*Able to find up competitors link
*Posting links on approve site with actual PR
** familiar with the Penguin situation