“When one door closes, another door opens; but we so often look so long and so regretfully upon the closed door, that we do not see the ones which open for us.” ~Alexander Graham Bell Have you ever been so stuck on a frustrating problem or project that you missed a few good opportunities in the meantime? Sometimes we have to accept the fact that something isn’t working — whether it’s a product that isn’t right for us, a career we’ve outgrown, or a dead-end relationship. Giving up on something after you’ve given it your best effort doesn’t always mean you’ve failed. As today’s quote reminds us, great inventors like…