First of all, you need to post a quality content. you need to regularly post and to comment on other people´s posts. You can use resteem bots to bring your content more visible. And don´t give up, it is a process. And if you mean on that number in bracket beside your name, it is your rating,not steem power. That rating will increase over time,and again, with your quality content. I have increased mine from 25 to 32 in 7 days.