Exactly forum posting is a good technique to get backlinks for your site and i also like daniweb,pixel2life and 9mb.

keyword stuffing means you use a keyword in content more then requirement.

yup site map is very important to crawl for search engine to your site. it is the address of your site pages.

happygeek commented: yawn - smells like sig spam -3

Do social bookmarking, forum posting and blog commenting to get good traffic and visitor's for your site.

happygeek commented: really? yawn yawn yawn -3