I agree with tips you have provided but I disagree that it is the "Only" way to promote your blog or website. SEO does help promote your blog/website so it comes up in organic searches but there are other ways to promote such as using your site in your forum signatures, Twitter/Facebook/LinkedIn, Social bookmarking sites such as Digg/Reddit/StumbleUpon/Delicious, joining blog communities/groups, networking with other bloggers in your niche or field, commenting on other blogs that are CommentLuv enabled, submitting your site to Dmoz, Technorati, and other blog listing sites.