i'm currently using Google to park my domain dailymotivation4u.com , so what should i do to make my domain get more present in public? Is it prohibited by putting it at signature in every forum?
Promoting duplicate domains (parked domains) in signatures and in forums is common, just don't try to promote to Google and Yahoo, your page rank will take a hit for promoting duplicate domains pointing the same content.
According to google guidelines, domain parking is not allowed. You should promote only one domain for one site. In domain parking condition, your website can face content duplication problem. once your website come under content duplication, it can be penalized and your current ranking of the website may also affected. if you would like to promote your website with your true efforts, you should go with google and other search engine guidelines. if you have same theme websites, you should create different website with physical existence. You will get good traffic and website reputation at search engine.