Only two parts are there in SEO that is On-Page and Off-Page. What you have posted that comes under Off-Page part of SEO.
SEO techniques can be used to many areas of a website such as the material (text) on sites and weblogs, pictures and video clips, links.
Directories Submission, Article Submission, Press Release, free Classified Ads, Forum Posting, WEB 2.0, Video Submission, Bookmarking Submission
These not the parts of SEO,these are techniques of SEO. SEO means search engine optimization.It is increase the visibility of the website. SEO have just two parts On-Page and Off-Page.
SEO has traditionally divided into two main areas : â‘ On-page optimisation : Which covers what can be done on the pages of the website itself, and â‘¡ Off-page optimisation : Which covers activity that takes place elsewhere.
Leaving feedback and community publishing are great if your feedback are suitable. Writing and submitting articles can be good if you are really careful re copy content.
Off Page helps in maintaining your page rank in search engines whereas On Page takes your page rank higher. So start doing On page also.
Mainly there are only 2 parts of SEO i.e On-page and Off-page. All the methods that you have shared are off-page optimization techniques. There are lot more such techniques. Besides these off-page techniques which are equally important, there also exists on-page part which is also very important in SEO which includes keyword research, giving title, tags, meta descriptions, uploading images, etc and one another most important thing is the CONTENT which is known as the king of SEO....
"are you know what are the parts ...." i think you better do something with your english. and your information is not right, only 2 parts of SEO, on and off.simple.