Can you control the amount of time your site is in a Google sandbox? No, but there are ways in which you can actively help decrease the damages of the sandbox effect. If you attempt to control a sandbox, you will be heavily penalized and in some cases, your site will be completely banned. Therefore, I would highly suggest not trying to fool Google and just wait it out.
According to WebConfs.com, these are the following steps you can take that legitimately MAY allow your site to get out of the sandbox a bit sooner:
· Actively gather content and good links. Constantly update and optimize the content contained in your site. An excellent way to do this is to create a blog within your site. Again, do not rely on the quantity of inbound links, but the quality. Build credible links slowly and steadily.
· Plan ahead. It’s ok to launch a couple of pages at a time. This will allow time to be running parallel to your site development efforts.
· Buy old or expired domains. New sites on new domains will generally take a longer amount of time to be processed out of a sandbox.
· Host on a well-established host. While free hosts are cost effective, they are not generally a good idea for SEO. You can also host your main site on a sub domain and on a separate domain host just some contents, linked with the main site.
· Concentrate on less popular keywords. Depending on the amount of competition your keywords have with your competitors, you may actually be able to appear at the top of SERPs from the very beginning. While you wait to get to the top for the most lucrative keywords, you can discover that even less popular keywords are available to push your site to the top. So, it may not hurt to make some optimization efforts for them.
· Rely more on non-Google ways to increase traffic. While Google is widely considered the most reliable search engine, you can also concentrate some efforts on other search engines that virtually have no sandbox at all.