Sure, sometimes I get frustrated, or go into a panic .... "Why isn't this working? It's going to blow up! They'll fire me and I'll never get another girlfriend!"

Then I find the place where I set a variable to undef and go back to normal mode.

Most of the time, especially sincee I adopted test-driven development and started writing a test, developing a few lines to suit the test, things are under control. It's simply a matter of figuring out which solution would be best, benchmarking to verify efficiency, refactoring code, and continuing on.