For making it PR4 or 5 you may need 3k to 4k backlinks but it also depends on the sites names and keywords.

I don't think it will be right decision. You can do many other things other than this and which are more effective also.

The best way will be promoting your website with certain special keywords. If traffic will increase on your website then automatically the product will get lots of advertising.

If it is a video file then you can convert it into 3gp or other format. But I think you tube supports 3gp format only.

The best thing for you will be forum posting. Making multiple posts in a forum can give you good responses.

Nothing is impossible.The first thing where you are lacking is confidence,second thing lack of information,no proper knowledge.so don't give up try and try until you get success.

The actual definition of marketing is "Manage the man according to the time:.social marketing means taking all the import things in the mind which will be benefited for social life like ethics,legal...

Wow its great job you people are doing .Helping the needy people who want to study with full time work.How you people manage this.

I think you should the correspondence as it is equivalent to the degree. It will be easier for you .