There are a number of online services that will write and submit press release for your website. These services normally priced about $100. I ran my research on several of these services and read positive reviews on them.
What do you think about these services? Will it be helpful if I'm looking for some real traffics? Do you have any success by outsourcing your press release works?
If that (other than hawking your site yourself) is where you wish to go, just get a guarantee from the company for new inbound traffic. Probably won't do that, of course. Their business is writing up a release. Suggest you promote yourself first. Better yet, get local news media to interview/review you. Work it from there. Not saying these folks can't help, just urging you do all you can first before shelling out funds for a no guarantee of results.
I once published several piece of press release with online media. In my opinion, if you want to gain more visitors by submitting press release to different sites as many as possible, it's not a good choice. Of course, pr does bring some visitors, but the ROI is quite poor. Maybe it would be better to treat as a way to build company brand rather than bring visitors.