Basically there is the wrong way to go about it.

First you need to improve the design or hire some special web design company.

Secondly you need to prove proof of funds. You need to sign a message proving that you own at least 10 BTC > to make sure you won't lead to insolvnecy.

Thirdly, you can start a signature campaign and get it promoted on Bitcointalk. You can also get it promoted in similiar ways on Reddit and Twitter.

Fourthy you can start contests and promotions. Like a faucet or free deposit bonuses and such.