In my first full calendar year of running a consulting business, I've learned a ton...mostly because of mistakes. I'm going to tweet one a day for the rest of 2016.
You can follow them on Twitter here: https://twitter.com/stepheneronan
I will curate all of them on Storify in January.
Feel free to tweet what you've learned with the #TIKN hashtag and I will add the best to my Storify.