As someone with generalized anxiety and social phobia, as someone who has worked in an organization and as a freelancer, I can become very concerned about the type of work situations and people I will encounter. I always want to be highly competent. My solution? Over-prepare! It is time consuming but it is the price I pay to feel confident. Oddly, once I fit into an organization I very much look forward to going to work and even feel better (ie less generally anxious) at work than at home. I think I perform better under structure and when I have a defined purpose.