Hi! As others said that submitting site to social bookmarking sites is an easy way to get indexed quickly, but this is not true. There are two sections there, one is upcoming, and another is published. I heard that around 24 hours, after being submitted, site will get indexed, but when I submitted my site to social bookmarking, I had to wait more than two weeks with no result at all. It still is at upcoming section; and there is no backlink from that site at all.