Keep your website updated as per the latest developments, Google crawler crawls periodically, so you need not worry much about thatt.
Hello, Tweet on twitter with your website link. Other then that you have to do regular off-Page work for your website. Thanks, Easy Content Writing
First thing you can’t force Google crawl bot to visit you site more often. Then you can do is to invite it to come on. But for that some basic points you must need to follow: 1)update you content Regularly: 2)Make sure your server works correctly: 3)Avoid duplicate content and different URLs: 4)Add a sitemap 5)unique title and meta tags
Keep your websites updated, consider the quality content of the articles to be posted, unique keywords that best describe your site, avoid duplication of every contents and most important thing is make sure that your server works properly and effectively.
Twitt and share your content. And update your website as often as possible. As you know, content is king and crawlers acces your website as often as they think you update it.
on top of content and backlink, you can simply submit your webpage in Google webmaster : "fetch as Googlebot". if Googlebot is successfully fetched your page, you can submit that page to index.