Selected answers from the Dumb SEO Questions G+ community.
Naveen Prakash: Simple just try to fetch new url through google search console(webmaster). Will index in 2 hrs or less.
Peter Nikolow: using ping to them. You can use WordPress pinging functionality or some external tool as mine SEOPingler: http://www.mobiliodevelopment.com/seopingler
George G.: https://www.google.com/search?q=submit+url&ie=utf-8&oe=utf-8&client=firefox-b&gfe_rd=cr&dcr=0&ei=bYoJWuCPAa6T8Qe9rIeADw
if you want to make it fast, you need traffic as well. reddit helps or some social signals
Ammon Johns: Pings help, but I believe they are still tied somewhat to crawl priority, so great if your blog already gets visits and has good links. Submission not so much as it merely adds you to the `to crawl` list with no particular priority.
Ultimately those are very temporary and sub-optimal fixes. I advise instead that you focus entirely on raising the crawl priority of your blog in the first place, which is done by making it more important to more people. More citations, more activity, more user interaction all signal to Google that the blog matters more, and deserves crawling more often.
Rasmus Sørensen: Fecth as Googlebot in Search Console will usually do the trick.
Jeff Ferguson: Share it as a tweet, which you’ll probably do anyway. We’ve seen tests where this gets a page indexed within an hour. Social media doesn’t help with ranking, but since google indexes Twitter quickly, you’ll get crawled as well.