Well, to make your blog post or website homepage being indexed by Google within 24 hours or less is simply you just need a blog that have at least having page rank PR 3 as this blog. I am not sure with PR 2 or lower. Please inform us if the PR 2 can make it possible to be indexed and crawled by Google within 2 hours.
Next question is how to make blog with PR 3 ? Simply, just blogging, writing unique contents regularly with wordpress.com and Google will love your blog and grant you PR 3 or higher. May be it take 6 or 12 months.
If 6 months is to long, some blogger suggest to add your site to blogcatalog.com and similar site.
Google index my post within 5 minutes (don’t let google stop indexing your post)