I post this thread is for collecting all SEOs best experience to let other SEO fans to have good ways to optimize their site rank on SEs. and to avoid any unusefull effort for this. The ways I use for it as follows: 1- Building links with other relative site with High PR. This is the basic way and also the important way; 2- Building as many as blogs and build blog enroll to your site. This is the good ways which you can easily to get backlinks. 3-Registering forum and post, this is also one good way but not the best way; 4-post comments on other's blog with High PR. this is also one effective way. But now most blogs have anti-comments sys and it isnot easy to get. 5-Post aritcle. but this require original comments and it will cost much time and much energe to get. Any others way or tools to get backlink,please follow this thread and post. Thanks.