There are many press release websites. The rule of thumb is that the bigger their PR (page rank) is than most likely will be harder to get your press release in. SO what to do ?
You must balance your press release submission between very big sites and new/niche press release websites.
You submit press releases to get targeted visitors and backlinks.
But this take time and time is money. I suggest you use a software to maximize the time efficiency.
Press Equalizer is an easy-to-download PC software you can run right on your computer (zero costly monthly payments).
Authors website where you can buy the press release software
Press Release software