One of the biggest sources of anxiety for me is not knowing the answer to a problem. I used to spend hours digging into a problem which may not sound bad but when you're doing the same thing over and over and not making any forward progress, then this is bad. It's bad because I feel that it emphasizes to me that I don't know what the answer is which then causes me anxiety. When I finally started walking away from these types of problems and telling myself that it's okay that I don't know the answer, and believing in myself that I will eventually find the answer, answers started coming to me. Sometimes the answers came when I was staring at the sky trying to think about nothing. Sometimes the answers came when somebody else said something that inspired me to think a different way. I find that taking a break from problem solving can sometimes be the best way to solve a problem.