Covering breaking news is a skill a reporter has to develop with experience. Because the work is so fast-paced, it can be very stressful.
One challenge is reporting the facts accurately while while still getting the story published as fast as possible.
A way to overcome this challenge would be to audio record any interviews or press conferences to ensure you're getting the information correct word-for-word. Another solution is to recheck your facts as many times as you can. This might mean using the internet or finding a second source. You can never be too careful.
Another challenge to covering breaking news might be the gruesome nature of the stories. Not all stories are difficult to stomach, but shootings, explosions, major traffic accidents and other tragedies are all breaking news.
A solution would be to focus on the humanity at the scene. If there's someone who tried to beat the odds to save others, then tell their story. If a great number of people turned out to help, then report on that. It might make the burden of being on the scene a little lighter.