We have higher expectations than most for SEO friendly. Specifically, we ensure that the general directories that we choose:
1.pass PageRank (links are dofollow and are not redirected).
2.have at least 50 pages indexed by Google.
3.are not penalized by Google.
4.do not belong to a large network of sites hosted on the same IP. We do not submit to more than one directory from the same IP.

Nice tips for the directory submission.Directory submission is really good way to create links.

We have to choose based on DA. There are many directory sites. If your business is in specialized industry so use industry specific directories. Take help of online directories. You have to search high DA directories to promote your business. Helps to lead credibility for your brand. You can find directories easily in online.

Unfortunately directory submissions has no effect today and some of them are paid links.

we must select a niche related directory sites to get backlinks

Choose relevant directory sites with high PA & DA and prefer to submit your website in instant approval directory sites.