Ok, not that shortly but sooner than before :P
Here are some tips you may find useful,
http://www.wattpad.com/writertips
Also, being a supportive reader will be a great help too. You can read stories, give constructive comments to others and then make some new friends. The more friends you make, the more likely your friends will return the favor and read your stories.
Wattpad has also the "Share Your Story" club, here is the link,
http://www.wattpad.com/club/38-club
Hope that info will be useful, if you have anymore questions just ask :)