Some of it is covered in the article; for example I once had a prospect want me to sign a web dev firm want a non-complete which said I wouldn't work in any industry they work in. I believe every client I've had before / after would classify. I'm not going to sign away my right to take on clients.

I've seen IP ownership clauses that say the client owns everything I create, whether or not it was done for them. These clauses are written in such a way that the client could claim ownership of work I did for other clients, my blog posts, podcasts, books I've written, and even things that have nothing to do with tech, such as songs I've written and/or recorded.

I try to make such IP transfer clauses as specific to the work I do for the client as possible.