A couple of ways.
- Add it to your pitches. So this could be a direct link in your emails to your Press Release (Or Press Kit ideally, which would contain images, videos etc., too).
- Use a service like
http://www.crowdfundingpr.org/ (Owned by Sal on this forum)
- Use other services, my preference is Prweb.com
Your press release could be added to a Google Drive, Dropbox or a website /press page (this is best).
If you're using a service, note that your Press Release blast will be like a wave...you need to hit it at the right time (physical time and also events type time too), in order for it to get picked up by relevant parties.
Your press release should explain what you're doing and show off something interesting.
EXAMPLES:
"Guy launches a Campaign based on a Dream of Donald Trump & Overfunded by 1000%" is something Press Release worthy...
"World's Best Pants launches on Kickstarter" isn't Press Release worthy...