I have used twitter for a number of years, I often check in times of Crisis or "Big News", by following enough of the right people you have fast access to breaking news. I follow news organizations, journalists, media critiics a few politicians, NGOs and writers. Then there are the local connections, friends, artists local notables etc.
I might look at Twitter a few times in a week or a few times in a day depending on world events or my free time. My twitter stream is congested but the interface lets you scan quickly and you have the ability to create lists to segregate different types in to groups, this helps cut down on chatter when you are interested in something specific.
I am sharing a tweet above from a local tweeter user, Bertha , "I’m Bertha, the world’s largest-diameter tunneling machine. In summer 2013, I started digging the SR 99 tunnel to replace Seattle’s Alaskan Way Viaduct". You see by the example that even objects or buildings can have a twitter feed. This example is the nugget in this post, today Bertha told the citizens of Seattle two very important things :
WSDOT should put these tweets on a billboard ayt each end of the viaduct. #local