I've spent most of my professional life on Twitter. I've made it work for my own brand and, as a marketer, work for the business of the companies I have represented. What I'm trying to say is -- I can't imagine work and business and life without Twitter.
But following in particular is out of control. The days of "I follow you and you follow me back" are long dead, I hope. (How to get followers is the topic for another post). I don't get how a person can honestly follow thousands -- or tens of thousands -- of people and still find value in using Twitter. My Twitter usage varies, but it is undeniably the #1 place I get my information and news. It shapes my worldview.
So I have a rule for myself: follow no more than 100 people. Of course this is a rule of thumb, at the current moment I am higher, but this means I require myself to regularly audit and prune the people and information I allow into my life. And this is advice I give to anyone else looking to get value from Twitter. I came up with the 100 numbers after years of trial and error with different limits, but I'm not surprised is it so close to Dunbar's number.
And if you might be looking for someone to follow, I'm @yes.