Tip - Build a good but short list

A simple Google search can tell you the top 10-20 reporters within your niche market, don't go out spamming thousands at once with your bot - focus on the quality over the quantity that you send out. Make each contact last.  Build a relationship by following them, liking their post and participating in conversations.  If they already know your name, the chances of your story getting picked up are a lot higher.