I never understood the need to do things in order to get indexed. Youll index eventually, dont focus on it.
But i guess my tip would be to submit site to google/bing/yandex webmaster tools, and to do social shares, and if possible some backlinks.
Of course, try to have a website worth indexing eh. If youre selling organs obtained by hot russian chicks who lure dudes in dark hotels and remove their kidneys and stuff, and your website looks like crap, then you may not index, or you may get deindexed fast.
Website loading speed also, make sure its fast. Make sure you have your https/ssl working also.