In order to do your calculus homework you've got to know how to utilize your own problem solving skills to create an answer to your homework problems. Recently, when trying to solve a problem I spent almost a half hour trying to solve a problem, but kept coming up with an incorrect answer each time! I can attribute this to the fixed mind-set problem because I kept trying to use the same methods each time on this specific question. Eventually, I had to figure out a new way to solve the problem, which required me to learn another method of approaching this problem.

Overall, the fixed mind-set seems to be a problem for me because I'll feel as though I know how to do something and keep trying a useless method to do it. Sometimes, I'm too stubborn to learn a new way of approaching problems. If you can realize you're having trouble with the fixed mind-set early on in problem solving, you can save yourself a lot of time. Keeping an open mind to alternative approaches can prove to be useful. Sometimes you overestimate your confidence in your abilities and will be hesitant to change the way you do things.
I COMPLETELY agree with you. The fixed mind-set problem keeps happening to me all the time. Whenever I see a similar integration problem or a word problem, I would use the same methods over and over again even though I'd end up with an incorrect answer. I would refuse to try a different method that my friend or the textbook would suggest because I believed that since I got the correct answer so many times using my method, I'll get the correct one this time as well. You are absolutely right when you suggest that we should always keep an open mind and try using new methods to solve problems which would save us a lot of time and add to our pool of knowledge.