Directory submission is the best method by which you can have your own web links inward and push your rankings in search engines up. You can do the directory submission on your own or opting for the companies that provide the service to help you save your valuable time and do the job efficiently. Either way, the activity will affect the overall rankings in the search engine. There are thousands of directories available here and you may go about doing the job efficiently with all those that connect to your site.
Here some list of websites are given for directory submission.