When I get stuck on problems like this for too long, I pause the troubleshooting effort and try to find other ways to be productive. This takes your immediate f

When I get stuck on problems like this for too long, I pause the troubleshooting effort and try to find other ways to be productive. This takes your immediate focus off the problem and lets your background mind work on it. Sleep on it. Then give a slow, thorough explanation of the problem to someone else who is unfamiliar. Doing so will often help you identify additional debugging steps you hadn't thought of, or to question assumptions you may have held onto unnecessarily.