How can a site be fast indexed for new content
 

generate backlinks to your new content by:

1. Highlight them on your home page (usually your most spidered page).

2. If you have a blog with you site - blog about the new content.

3. Pay for a link to the new content on a high PR (6+) site.

4. Submit articles to article sites like (ezinearticles), or a few blog posts.

New page - resubmit your sitemap to SEs
New content - build links about that new content, or blog it to build more backlinks