I use wordpress to lunch my website and i'm convinced that it increases my SEO ranking. Is there any new/other technique for SEO?
Are you following all the basic SEO techniques? Like: On Page SEO, Article Submission, Social Bookmarking, Backlinking etc? If you are you're doing fine. If not, doing the above will certinaly increase your ranking further. Find a forum that is based around your niche and start building a reputation there. This can lead to more traffic and with a good reputation, can gain you trust and potential sales.
Stick to the basics, like On Page, Off Page and then if you like (you should) go for some Social Media as well.
I agree that all technique are some manner same , but the thing is how we used it , and how much quality we can provide. As quality content is prior thing for major success.
tips is that SEO is a long term process so, do all white hat seo and have a patience for 1-2 months . because seo gives result but within 1-2 months