#3 -- Wasting my time researching better tools, rather than investing my time actually creating something.
#2 -- Using my professional accomplishments to measure how I'm doing, rather than using more accurate measurements, like how my family is feeling about me.
#1 -- Viewing pain and difficulty as issues to be resolved, rather than necessary (even good) steps in the journey.
* This may all change though. I still have 2 more months to top these. :)