Yes, these old techniques are favorite all the time. You can add social bookmarking, signature links and do follow etc.
Directory submissions are very useful to get your new website indexed by Google and Yahoo. As far as PageRank, it isn't as effective as it was a few years ago. However, a good directory can still deliver you ample traffic. There are many SEO techniques that work. Furthermore, there are a lot more than what you have listed here. Checkout my SEO blog if you are interested in optimization techniques that improve your search engine rankings and deliver targeted organic web traffic to your site. If you have a WordPress blog, there are tons of things you can do to improve SEO and search engine traffic.
You are right. But we can change it. How? We must stopped use google analytics and gmail. This is things by which google can know all things about all users. I think that parameters in google analytics make influence on ranking.
@master02 thanks for the complement. SEO must always be ready for change. Who knows what will the future brings? I believe marketing of website will stay forever, the algo might change but the search for new information is constant
all these work but dont work also. it is not always such a simple question. read more behind the lines in SEO articles. A link to your site is something that can be good, bad or nothing. Depends on many things.