submit my site on Yahoo for free... How ?

Answer 1

First you seach for your site by entering it in the search box. If you find your site, you do not need to submit it. If you do not find it, then go to the main www.yahoo.com page and go thru categories. Just follow their instructions at this site:
search.yahoo.com/info/submit.html

Answer 2

Try this, You may get a few spam emails later on so use a junk email address. Just remember submitting a site to these sites is only the tip of teh iceberg. Page content and keywords within teh content are 10X more important.